diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..a070426
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,18 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}\\week-1\\2-mandatory\\3-function-output.js"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/week-1/1-exercises/B-hello-world/exercise.js b/week-1/1-exercises/B-hello-world/exercise.js
index b179ee9..af90bfd 100644
--- a/week-1/1-exercises/B-hello-world/exercise.js
+++ b/week-1/1-exercises/B-hello-world/exercise.js
@@ -1 +1,2 @@
+var name = "Hello world!";
 console.log("Hello world");
diff --git a/week-1/1-exercises/C-variables/exercise.js b/week-1/1-exercises/C-variables/exercise.js
index a6bbb97..980ecbd 100644
--- a/week-1/1-exercises/C-variables/exercise.js
+++ b/week-1/1-exercises/C-variables/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `greeting`
-
+var greeting ="Hello World";
+console.log(greeting);
+console.log(greeting);
 console.log(greeting);
diff --git a/week-1/1-exercises/D-strings/exercise.js b/week-1/1-exercises/D-strings/exercise.js
index 2cffa6a..b9433fe 100644
--- a/week-1/1-exercises/D-strings/exercise.js
+++ b/week-1/1-exercises/D-strings/exercise.js
@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
+var message = "This is a string";
+var messageType = typeof message;
 
-console.log(message);
+console.log(messageType);
diff --git a/week-1/1-exercises/E-strings-concatenation/exercise.js b/week-1/1-exercises/E-strings-concatenation/exercise.js
index 2cffa6a..e4483c3 100644
--- a/week-1/1-exercises/E-strings-concatenation/exercise.js
+++ b/week-1/1-exercises/E-strings-concatenation/exercise.js
@@ -1,3 +1,8 @@
 // Start by creating a variable `message`
+var greetingStart = "Hello, my name is ";
+var name = "Nihal";
+
+var greeting = greetingStart + name;
+
+console.log(greeting);
 
-console.log(message);
diff --git a/week-1/1-exercises/F-strings-methods/exercise.js b/week-1/1-exercises/F-strings-methods/exercise.js
index 2cffa6a..5011ff9 100644
--- a/week-1/1-exercises/F-strings-methods/exercise.js
+++ b/week-1/1-exercises/F-strings-methods/exercise.js
@@ -1,3 +1,6 @@
 // Start by creating a variable `message`
+var name = "Daniel";
+var nameLength = name.length;
+
+console.log(nameLength);
 
-console.log(message);
diff --git a/week-1/1-exercises/F-strings-methods/exercise2.js b/week-1/1-exercises/F-strings-methods/exercise2.js
index b4b4694..87c3ae2 100644
--- a/week-1/1-exercises/F-strings-methods/exercise2.js
+++ b/week-1/1-exercises/F-strings-methods/exercise2.js
@@ -1,3 +1,4 @@
-const name = " Daniel  ";
+var name = "Daniel";
+var nameLowerCase = name.toLowerCase();
 
-console.log(message);
+console.log(nameLowerCase);
\ No newline at end of file
diff --git a/week-1/1-exercises/G-numbers/exercise.js b/week-1/1-exercises/G-numbers/exercise.js
index 49e7bc0..c69e7c9 100644
--- a/week-1/1-exercises/G-numbers/exercise.js
+++ b/week-1/1-exercises/G-numbers/exercise.js
@@ -1 +1,4 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+var numberOfStudent = 15;
+var numberOfMentors = 8;
+var sum = numberOfStudent + numberOfMentors;
\ No newline at end of file
diff --git a/week-1/1-exercises/I-floats/exercise.js b/week-1/1-exercises/I-floats/exercise.js
index a5bbcd8..9aaae41 100644
--- a/week-1/1-exercises/I-floats/exercise.js
+++ b/week-1/1-exercises/I-floats/exercise.js
@@ -1,2 +1,4 @@
 var numberOfStudents = 15;
-var numberOfMentors = 8;
+var numberOfStudents = 8;
+var total = numberOfStudents + numberOfStudents;
+var percentagOfStudents = Math.round((numberOfStudents/total)*100);
\ No newline at end of file
diff --git a/week-1/1-exercises/K-functions-parameters/exercise.js b/week-1/1-exercises/K-functions-parameters/exercise.js
index 8d5db5e..ccc3641 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise.js
@@ -1,6 +1,6 @@
 // Complete the function so that it takes input parameters
-function multiply() {
-  // Calculate the result of the function and return it
+function multiply(a, b) {
+  return a*b;
 }
 
 // Assign the result of calling the function the variable `result`
diff --git a/week-1/1-exercises/K-functions-parameters/exercise2.js b/week-1/1-exercises/K-functions-parameters/exercise2.js
index db7a890..8b6ae2a 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise2.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise2.js
@@ -1,4 +1,6 @@
-// Declare your function first
+function divide(a, b) {
+    return a/b;
+}
 
 var result = divide(3, 4);
 
diff --git a/week-1/1-exercises/K-functions-parameters/exercise3.js b/week-1/1-exercises/K-functions-parameters/exercise3.js
index 537e9f4..0a724ea 100644
--- a/week-1/1-exercises/K-functions-parameters/exercise3.js
+++ b/week-1/1-exercises/K-functions-parameters/exercise3.js
@@ -1,5 +1,7 @@
-// Write your function here
+function createGreeting(num1, num2) {
+    return num1 + num2;
+}
 
-var greeting = createGreeting("Daniel");
+var greeting = createGreeting("Hello, my name is ", "Nihal.");
 
 console.log(greeting);
diff --git a/week-1/2-mandatory/1-syntax-errors.js b/week-1/2-mandatory/1-syntax-errors.js
index 6910f28..415720b 100644
--- a/week-1/2-mandatory/1-syntax-errors.js
+++ b/week-1/2-mandatory/1-syntax-errors.js
@@ -2,15 +2,15 @@
 
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a, b, c) {
     return a + b + c;
 }
 
 function introduceMe(name, age)
-return "Hello, my name is " + name "and I am " age + "years old";
+return 'Hello, my name is ' + name + 'and I am '+ age + 'years old';
 
 function getAddition(a, b) {
-    total = a ++ b
+    total = a + b
 
     // Use string interpolation here
     return "The total is %{total}"
diff --git a/week-1/2-mandatory/2-logic-error.js b/week-1/2-mandatory/2-logic-error.js
index 1e0a9d4..43da8cf 100644
--- a/week-1/2-mandatory/2-logic-error.js
+++ b/week-1/2-mandatory/2-logic-error.js
@@ -1,16 +1,15 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getWordLength(word) {
-  return "word".length()
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  return a * b * c;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== 
@@ -22,14 +21,23 @@ To run these tests type `node 2-logic-error` into your terminal
 function test(test_name, expr) {
   let status;
   if (expr) {
-      status = "PASSED"
+      status = 'PASSED';
   } else {
-      status = "FAILED"
+      status = 'FAILED';
   }
 
-  console.log(`${test_name}: ${status}`)
+  console.log(`${test_name}: ${status}`);
 }
 
-test("fixed trimWord function", trimWord("  CodeYourFuture ") === "CodeYourFuture")
-test("fixed wordLength function", getWordLength("A wild sentence appeared!") === 25)
-test("fixed multiply function", multiply(2,3,6) === 36)
\ No newline at end of file
+test(
+  "fixed trimWord function",
+   trimWord("  CodeYourFuture ") === "CodeYourFuture"
+   );
+test(
+  "fixed wordLength function",
+   getWordLength("A wild sentence appeared!") === 25
+   );
+test(
+  "fixed multiply function",
+   multiply(2,3,6) === 36
+   );
\ No newline at end of file
diff --git a/week-1/2-mandatory/3-function-output.js b/week-1/2-mandatory/3-function-output.js
index bbb88a2..3956bdf 100644
--- a/week-1/2-mandatory/3-function-output.js
+++ b/week-1/2-mandatory/3-function-output.js
@@ -1,9 +1,14 @@
 // Add comments to explain what this function does. You're meant to use Google!
+
+//returen random number between 0 ans 9.99
 function getNumber() {
   return Math.random() * 10;
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
+
+// this function takes one array and merges into another
+// if first parameter w1 is a string, then it will do just a string concatenation
 function s(w1, w2) {
   return w1.concat(w2);
 }
@@ -11,6 +16,7 @@ function s(w1, w2) {
 function concatenate(firstWord, secondWord, thirdWord) {
   // Write the body of this function to concatenate three words together
   // Look at the test case below to understand what to expect in return
+  return `${firstWord} ${secondWord} ${thirdWord}`;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== 
@@ -22,9 +28,9 @@ To run these tests type `node 3-function-output` into your terminal
 function test(test_name, expr) {
   let status;
   if (expr) {
-    status = "PASSED";
+    status = 'PASSED';
   } else {
-    status = "FAILED";
+    status = 'FAILED';
   }
 
   console.log(`${test_name}: ${status}`);
@@ -32,13 +38,13 @@ function test(test_name, expr) {
 
 test(
   "concatenate function - case 1 works",
-  concatenate("code", "your", "future") === "code your future"
+  concatenate('code', 'your', 'future') === 'code your future'
 );
 test(
   "concatenate function - case 2 works",
-  concatenate("I", "like", "pizza") === "I like pizza"
+  concatenate('I', 'like', 'pizza') === 'I like pizza'
 );
 test(
   "concatenate function - case 3 works",
-  concatenate("I", "am", 13) === "I am 13"
+  concatenate('I', 'am', 13) === 'I am 13'
 );
diff --git a/week-1/2-mandatory/4-tax.js b/week-1/2-mandatory/4-tax.js
index 6b84208..cbd343e 100644
--- a/week-1/2-mandatory/4-tax.js
+++ b/week-1/2-mandatory/4-tax.js
@@ -5,7 +5,10 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(price) {
+  const tax = price * 0.2;
+  const totalPrice = tax + price;
+  return totalPrice;
 
 /*
   CURRENCY FORMATTING
@@ -28,9 +31,9 @@ To run these tests type `node 4-tax.js` into your terminal
 function test(test_name, expr) {
   let status;
   if (expr) {
-    status = "PASSED";
+    status = 'PASSED';
   } else {
-    status = "FAILED";
+    status = 'FAILED';
   }
 
   console.log(`${test_name}: ${status}`);
@@ -51,4 +54,6 @@ test(
   "formatCurrency function - case 2 works",
   formatCurrency(17.5) === "£21.00"
 );
-test("formatCurrency function - case 3 works", formatCurrency(34) === "£40.80");
+test(
+  "formatCurrency function - case 3 works", formatCurrency(34) 
+  === "£40.80");
diff --git a/week-2/1-exercises/B-boolean-literals/exercise.js b/week-2/1-exercises/B-boolean-literals/exercise.js
index 6c5060f..6bc05c6 100644
--- a/week-2/1-exercises/B-boolean-literals/exercise.js
+++ b/week-2/1-exercises/B-boolean-literals/exercise.js
@@ -5,12 +5,14 @@
   Add the required variables with the correct boolean values assigned.
 */
 
-var codeYourFutureIsGreat = true;
-
-/* 
-  DO NOT EDIT BELOW THIS LINE
-  --------------------------- */
+let codeYourFutureIsGreat = true;
+let mozafarIsCool = false;
+let calculationCorrect = true;
+let moreThan10Students = false;
 
+ /* DO NOT EDIT BELOW THIS LINE
+  --------------------------- 
+*/
 console.log("Is Code Your Future great?", codeYourFutureIsGreat);
 console.log("Is Mozafar cool?", mozafarIsCool);
 console.log("Does 1 + 1 = 2?", calculationCorrect);
diff --git a/week-2/1-exercises/C-comparison-operators/exercise.js b/week-2/1-exercises/C-comparison-operators/exercise.js
index 58aee1c..5086189 100644
--- a/week-2/1-exercises/C-comparison-operators/exercise.js
+++ b/week-2/1-exercises/C-comparison-operators/exercise.js
@@ -7,14 +7,15 @@
 
 var studentCount = 16;
 var mentorCount = 9;
-var moreStudentsThanMentors; // finish this statement
+var sum = studentCount + mentorCount;
+var moreStudentsThanMentors = studentCount > mentorCount; // finish this statement
 
 var roomMaxCapacity = 25;
-var enoughSpaceInRoom; // finish this statement
+var enoughSpaceInRoom = roomMaxCapacity === sum; // finish this statement
 
 var personA = "Daniel";
 var personB = "Irina";
-var sameName; // finish this statement
+var sameName = personA === personB; // finish this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/D-predicates/exercise.js b/week-2/1-exercises/D-predicates/exercise.js
index f600521..1b3df09 100644
--- a/week-2/1-exercises/D-predicates/exercise.js
+++ b/week-2/1-exercises/D-predicates/exercise.js
@@ -7,12 +7,13 @@
 
 // Finish the predicate function to test if the passed number is negative (less than zero)
 function isNegative(number) {
+  return number > 0;
 
 }
 
 // Finish the predicate function to test if the passed number is between 0 and 10
 function isBetweenZeroAnd10(number) {
-
+return number > 0 && number < 10;
 }
 
 /* 
diff --git a/week-2/1-exercises/E-conditionals/exercise.js b/week-2/1-exercises/E-conditionals/exercise.js
index acbaaa8..363c612 100644
--- a/week-2/1-exercises/E-conditionals/exercise.js
+++ b/week-2/1-exercises/E-conditionals/exercise.js
@@ -8,6 +8,12 @@
 
 var name = "Daniel";
 var danielsRole = "mentor";
+if (danielsRole === `mentor`) {
+  console.log("Hi, I'm Daniel, I'm a mentor.");
+}
+else {
+  console.log("Hi, I'm Daniel, I'm a student.");
+}
 
 /* 
 EXPECTED RESULT
diff --git a/week-2/1-exercises/F-logical-operators/exercise.js b/week-2/1-exercises/F-logical-operators/exercise.js
index a8f2945..90469ca 100644
--- a/week-2/1-exercises/F-logical-operators/exercise.js
+++ b/week-2/1-exercises/F-logical-operators/exercise.js
@@ -11,14 +11,14 @@ var cssLevel = 4;
 
 // Finish the statement to check whether HTML, CSS knowledge are above 5
 // (hint: use the comparison operator from before)
-var htmlLevelAbove5;
-var cssLevelAbove5;
+var htmlLevelAbove5 = htmlLevel > 5;
+var cssLevelAbove5 = cssLevel > 5;
 
 // Finish the next two statement
 // Use the previous variables and logical operators
 // Do not "hardcode" the answers
-var cssAndHtmlAbove5;
-var cssOrHtmlAbove5;
+var cssAndHtmlAbove5 = htmlLevelAbove5 && cssLevelAbove5;
+var cssOrHtmlAbove5 = htmlLevelAbove5 || cssLevelAbove5;
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/F-logical-operators/exercise2.js b/week-2/1-exercises/F-logical-operators/exercise2.js
index 6f4199c..96bc021 100644
--- a/week-2/1-exercises/F-logical-operators/exercise2.js
+++ b/week-2/1-exercises/F-logical-operators/exercise2.js
@@ -5,7 +5,29 @@
   Update the code so that you get the expected result.
 */
 
-function isNegative() {}
+function isNegative(number) {
+return number < 0;
+}
+
+
+function isNegative(number) {
+  return number < 0;
+  }
+
+  
+  function isBetween5and10(number) {
+    return number >= 5 && number <= 10;
+    }
+
+    
+    function isShortName(name) {
+      return name.length >= 6 && name.length <= 10;
+      }
+      
+
+      function startsWithD(name) {
+        return name[0] === "D";
+        }
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/G-conditionals-2/exercise-1.js b/week-2/1-exercises/G-conditionals-2/exercise-1.js
index 54708ef..528233c 100644
--- a/week-2/1-exercises/G-conditionals-2/exercise-1.js
+++ b/week-2/1-exercises/G-conditionals-2/exercise-1.js
@@ -6,10 +6,33 @@
   - if number is more or equal to zero, return the word "positive"
 */
 
-function negativeOrPositive(number) {
-
+function negativeOrPositive(number1) {
+if (number1 < 0) {
+  return "negative";
+}
+else {
+  return "positive";
+}
 }
 
+function negativeOrPositive(number2) {
+  if (number2 < 0) {
+    return "negative";
+  }
+  else {
+    return "positive";
+  }
+  }
+  function negativeOrPositive(number3) {
+    if (number3 < 0) {
+      return "negative";
+    }
+    else {
+      return "positive";
+    }
+    }
+
+
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */
diff --git a/week-2/1-exercises/G-conditionals-2/exercise-2.js b/week-2/1-exercises/G-conditionals-2/exercise-2.js
index 313f3fb..2f9fee9 100644
--- a/week-2/1-exercises/G-conditionals-2/exercise-2.js
+++ b/week-2/1-exercises/G-conditionals-2/exercise-2.js
@@ -8,9 +8,47 @@
 */
 
 function studentPassed(grade) {
+  if (grade < 50) {
+    return "failed";
+  }
+else {
+  return "passed";
+}
+}
+
+
+/*
 
+function studentPassed(grade1) {
+  if (grade1 < 50) {
+    return "failed";
+  }
+else {
+  return "passed";
+}
 }
 
+
+
+function studentPassed(grade2) {
+  if (grade2 < 50) {
+    return "failed";
+  }
+else {
+  return "passed";
+}
+}
+
+
+function studentPassed(grade3) {
+  if (grade3 < 50) {
+    return "failed";
+  }
+else {
+  return "passed";
+}
+}
+*/
 /* 
 DO NOT EDIT BELOW THIS LINE
 --------------------------- */
diff --git a/week-2/1-exercises/G-conditionals-2/exercise-3.js b/week-2/1-exercises/G-conditionals-2/exercise-3.js
index a79cf30..08d3991 100644
--- a/week-2/1-exercises/G-conditionals-2/exercise-3.js
+++ b/week-2/1-exercises/G-conditionals-2/exercise-3.js
@@ -9,8 +9,85 @@
 */
 
 function calculateGrade(mark) {
+  if (mark >= 80) {
+    return "A";
+  }
+else if (mark < 80 && mark >60) {
+  return "B";
+}
+else if (mark <= 60 && mark >= 50) {
+  return "C"
+}
+else {
+  return "F"
+}
+}
+/*
+function calculateGrade(grade1) {
+  if (grade1 >= 80) {
+    return "A";
+  }
+else if (grade1 < 80 && grade1 >60) {
+  return "B";
+}
+else if (grade1 <= 60 && grade1 >= 50) {
+  return "C"
+}
+else {
+  return "F"
+}
+}
 
+
+function calculateGrade(grade2) {
+  if (grade2 >= 80) {
+    return "A";
+  }
+else if (grade2 < 80 && grade2 >60) {
+  return "B";
+}
+else if (grade2 <= 60 && grade2 >= 50) {
+  return "C"
 }
+else {
+  return "F"
+}
+}
+
+
+function calculateGrade(grade3) {
+  if (grade3 >= 80) {
+
+    return "A";
+  }
+else if (grade3 < 80 && grade3 >60) {
+  return "B";
+}
+else if (grade3 <= 60 && grade3 >= 50) {
+  return "C"
+}
+else {
+  return "F"
+}
+}
+
+
+function calculateGrade(grade4) {
+  if (grade4 >= 80) {
+    return "A";
+  }
+else if (grade4 < 80 && grade4 >60) {
+  return "B";
+}
+else if (grade4 <= 60 && grade4 >= 50) {
+  return "C"
+}
+else {
+  return "F"
+}
+}*/
+
+
 
 /* 
 DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/G-conditionals-2/exercise-4.js b/week-2/1-exercises/G-conditionals-2/exercise-4.js
index bd5bb1e..4a4a7d2 100644
--- a/week-2/1-exercises/G-conditionals-2/exercise-4.js
+++ b/week-2/1-exercises/G-conditionals-2/exercise-4.js
@@ -10,6 +10,12 @@
 
 function containsCode(sentence) {
 
+  if (sentence.includes("code")) {
+    return true;
+  }
+  else {
+    return false;
+  }
 }
 
 /* 
diff --git a/week-2/1-exercises/H-array-literals/exercise.js b/week-2/1-exercises/H-array-literals/exercise.js
index d6dc556..cf961ea 100644
--- a/week-2/1-exercises/H-array-literals/exercise.js
+++ b/week-2/1-exercises/H-array-literals/exercise.js
@@ -4,8 +4,8 @@
   Declare some variables assigned to arrays of values
 */
 
-var numbers = []; // add numbers from 1 to 10 into this array
-var mentors; // Create an array with the names of the mentors: Daniel, Irina and Rares
+var numbers = [1, 2, 3, 4, 5, 6, 7, 7, 8, 9, 10]; // add numbers from 1 to 10 into this array
+var mentors = ["Daniel", "Irina", "Rares"]; // Create an array with the names of the mentors: Daniel, Irina and Rares
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/I-array-properties/exercise.js b/week-2/1-exercises/I-array-properties/exercise.js
index f9aec89..d05d607 100644
--- a/week-2/1-exercises/I-array-properties/exercise.js
+++ b/week-2/1-exercises/I-array-properties/exercise.js
@@ -6,8 +6,10 @@
 */
 
 function isEmpty(arr) {
-  return; // complete this statement
-}
+  return arr.length == 0;
+  }
+ 
+
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-2/1-exercises/J-array-get-set/exercise.js b/week-2/1-exercises/J-array-get-set/exercise.js
index 3b95694..18d072c 100644
--- a/week-2/1-exercises/J-array-get-set/exercise.js
+++ b/week-2/1-exercises/J-array-get-set/exercise.js
@@ -5,11 +5,11 @@
 */
 
 function first(arr) {
-  return; // complete this statement
+  return arr[0]; // complete this statement
 }
 
 function last(arr) {
-  return; // complete this statement
+  return arr[arr.length - 1]; // complete this statement
 }
 
 /* 
diff --git a/week-2/1-exercises/J-array-get-set/exercises2.js b/week-2/1-exercises/J-array-get-set/exercises2.js
index 97f126f..962bcda 100644
--- a/week-2/1-exercises/J-array-get-set/exercises2.js
+++ b/week-2/1-exercises/J-array-get-set/exercises2.js
@@ -7,7 +7,8 @@
 */
 
 var numbers = [1, 2, 3]; // Don't change this array literal declaration
-
+numbers.push(4);
+numbers[0];
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */
diff --git a/week-2/2-mandatory/1-fix-functions.js b/week-2/2-mandatory/1-fix-functions.js
index 6316fad..56db952 100644
--- a/week-2/2-mandatory/1-fix-functions.js
+++ b/week-2/2-mandatory/1-fix-functions.js
@@ -4,7 +4,7 @@
 function mood() {
   let isHappy = true;
 
-  if (isHappy) {
+  if (isHappy === false) {
     return "I am happy";
   } else {
     return "I am not happy";
@@ -13,9 +13,9 @@ function mood() {
 
 function greaterThan10() {
   let num = 10;
-  let isBigEnough;
+  let isBigEnough = 11;
 
-  if (isBigEnough) {
+  if (isBigEnough >= 10) {
     return "num is greater than or equal to 10";
   } else {
     return "num is not big enough";
@@ -24,21 +24,21 @@ function greaterThan10() {
 
 function sortArray() {
   let letters = ["a", "n", "c", "e", "z", "f"];
-  let sortedLetters;
+  let sortedLetters = letters.sort();
 
   return sortedLetters;
 }
 
 function first5() {
   let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
-  let sliced;
+  let sliced = numbers.slice(0, 5);
 
   return sliced;
 }
 
 function get3rdIndex(arr) {
   let index = 3;
-  let element;
+  let element = arr[index];
 
   return element;
 }
diff --git a/week-2/2-mandatory/2-function-creation.js b/week-2/2-mandatory/2-function-creation.js
index bf7ecfd..9cf2ed3 100644
--- a/week-2/2-mandatory/2-function-creation.js
+++ b/week-2/2-mandatory/2-function-creation.js
@@ -5,7 +5,10 @@ Write a function that:
 - removes any forward slashes (/) in the strings
 - makes the string all lowercase
 */
-function tidyUpString(strArr) {}
+function tidyUpString(strArr) {
+  let tidyStrArr = strArr.map(item => item.trim().replace('/', '').toLowerCase());
+ return tidyStrArr;
+}
 
 /*
 Complete the function to check if the variable `num` satisfies the following requirements:
@@ -15,7 +18,16 @@ Complete the function to check if the variable `num` satisfies the following req
 Tip: use logical operators
 */
 
-function validate(num) {}
+function validate(num) {
+  let isNumber = typeof(num) === 'number';
+
+  let isEven = num % 2 == 0;
+  let isLessThanOrEqual100 = num <= 100;
+  if(isNumber && isEven && isLessThanOrEqual100) {
+    return true;
+  }
+  return false;
+}
 
 /* 
 Write a function that removes an element from an array
@@ -26,7 +38,9 @@ The function must:
 */
 
 function remove(arr, index) {
-  return; // complete this statement
+  let newArr = arr;
+ newArr.splice(index, 1);
+  return newArr; // complete this statement
 }
 
 /*
@@ -37,9 +51,31 @@ Write a function that:
 - numbers greater 100 must be replaced with 100
 */
 
+/*function formatPercentage(arr) {
+  let newArr = arr.map(item => {
+    if(item > 100){
+      item = 100;
+    }
+    return `${Number(item.toFixed(2))}%`;
+  })
+  return newArr; 
+}*/
+
 function formatPercentage(arr) {
+  for( let i = 0; i < arr.length; i++){
+      if (arr[i] > 100){
+          arr[i] = 100;
+      }
+      let j = arr[i].toFixed(2)
+      j = parseFloat(j);
+      arr[i] = j.toString() + "%";
+  }
+  return arr;
+  }
   
-}
+
+
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/week-2/2-mandatory/3-playing-computer.js b/week-2/2-mandatory/3-playing-computer.js
index 0fa7c04..4b4bccd 100644
--- a/week-2/2-mandatory/3-playing-computer.js
+++ b/week-2/2-mandatory/3-playing-computer.js
@@ -15,6 +15,17 @@
   7. What is the value of the "a" outer variable when "f1" is called for the first time?
 */
 
+/*
+ANSWERS:
+1. b, d and e is not defined;
+2. removed: console.log(b);
+3. Will be printed: 2, 6,4,9,6,13,8;
+4. f1 is called 2 times;
+5. f2 is called 3 times;
+6. In the first f1 call a will be equal to 1;
+7. The value of the "a" outer variable when 'f1' is called fir the first time is 8;
+*/
+
 let x = 2;
 let a = 6;
 
@@ -28,13 +39,13 @@ const f2 = function(a, b) {
 
 console.log(x);
 console.log(a);
-console.log(b);
+//console.log(b);
 
 for (let i = 0; i < 5; ++i) {
   a = a + 1;
   if (i % 2 === 0) {
     const d = f2(i, x);
-    console.log(d);
+    //console.log(d);
   } else {
     const e = f1(i, a);
     console.log(e);
diff --git a/week-2/2-mandatory/4-sorting-algorithm.js b/week-2/2-mandatory/4-sorting-algorithm.js
index 3603942..041eff3 100644
--- a/week-2/2-mandatory/4-sorting-algorithm.js
+++ b/week-2/2-mandatory/4-sorting-algorithm.js
@@ -7,15 +7,36 @@ Today, you will be applying the sorting algorithm you used in that exercise in c
 Create a function called sortAges which:
 - takes an array of mixed data types as input
 - removes any non-number data types without using the built-in javascript filter method
-- returns an array of sorted ages in ascending order 
+- eturnrs an array of sorted ages in ascending order 
   - HARD MODE - without using the built-in javascript sort method 😎
 
 You don't have to worry about making this algorithm work fast! The idea is to get you to
 "think" like a computer and practice your knowledge of basic JavaScript.
 */
 
-function sortAges(arr) {}
+function sortAges(arr) {
+  //let swap;
+  let newArr = [];
+  for (let i = 0; i < arr.length; i++){
+    if (typeof(arr[i]) === "number"){
+      newArr.push(arr[i]);
+    }
+  }
+  for (i = 0; i < newArr.length; i++){
+    for (let j = i+1; j < newArr.length; j++){
+      if (newArr[j] < newArr[i]
+      ){
+swap = newArr[i];
+newArr[i] = newArr[j];
+newArr[j]= swap;
+      }
+    }
+  }
+  return newArr;
+}
+
 
+  
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const agesCase1 = [
diff --git a/week-2/3-extra/1-radio-stations.js b/week-2/3-extra/1-radio-stations.js
index 95c0e56..7948820 100644
--- a/week-2/3-extra/1-radio-stations.js
+++ b/week-2/3-extra/1-radio-stations.js
@@ -26,6 +26,11 @@
  */
 // `getStations` goes here
 
+function getAllFrequencies(list) {
+  var freq = []
+
+}
+
 
 /* ======= TESTS - DO NOT MODIFY ======= */
 
diff --git a/week-3/1-exercises/A-array-find/exercise.js b/week-3/1-exercises/A-array-find/exercise.js
index d7fd51f..9194741 100644
--- a/week-3/1-exercises/A-array-find/exercise.js
+++ b/week-3/1-exercises/A-array-find/exercise.js
@@ -5,11 +5,16 @@
 
 // write your code here
 
-var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
-
-var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
 
-console.log(longNameThatStartsWithA);
+function longNameThatStartsWithA(nams) {
+  return (nams.length > 7 && nams.charAt(0) === "A");
+}
+var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
+let firstnames = names.find(longNameThatStartsWithA);
+console.log(firstnames);
+/*var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
+}
+console.log();
 
 /* EXPECTED OUTPUT */
-// "Alexandra"
+// "Alexandra"*/
diff --git a/week-3/1-exercises/B-array-some/exercise.js b/week-3/1-exercises/B-array-some/exercise.js
index 965c052..119abea 100644
--- a/week-3/1-exercises/B-array-some/exercise.js
+++ b/week-3/1-exercises/B-array-some/exercise.js
@@ -12,12 +12,17 @@ var pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 // https://nodejs.org/api/process.html#process_process_exit_code
 // process.exit(1);
 
+
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 
 var pairs = pairsByIndex.map(function(indexes) {
+  if (indexes === null) {
+    process.exit(1);
+  }
   var student = students[indexes[0]];
   var mentor = mentors[indexes[1]];
+  
   return [student, mentor];
 });
 
diff --git a/week-3/1-exercises/C-array-every/exercise.js b/week-3/1-exercises/C-array-every/exercise.js
index b515e94..d809683 100644
--- a/week-3/1-exercises/C-array-every/exercise.js
+++ b/week-3/1-exercises/C-array-every/exercise.js
@@ -1,18 +1,43 @@
 /*
+
    This program should check if the array `group` contains only students
+
 */
 
+
+
 var students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
+
 var group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-var groupIsOnlyStudents; // complete this statement
+ // complete this statement
+ var groupIsOnlyStudents = group.every(students);
+
+function studentArrey(arr) {
+ 
+
+  return studentArrey(groupIsOnlyStudents);
+}
 
 if (groupIsOnlyStudents) {
+
   console.log("The group contains only students");
+
 } else {
+
   console.log("The group does not contain only students");
+
 }
 
+
+
 /* EXPECTED RESULT */
 
+
+
 // The group does not contain only students
+
+
+// var studentNameLength = students.every(isAboveThreshold);
+
+// console.log(studentNameLength); // logs true
\ No newline at end of file
diff --git a/week-3/2-mandatory/1-oxygen-levels.js b/week-3/2-mandatory/1-oxygen-levels.js
index 3c02135..35de4ed 100644
--- a/week-3/2-mandatory/1-oxygen-levels.js
+++ b/week-3/2-mandatory/1-oxygen-levels.js
@@ -9,9 +9,16 @@ To be safe, they need to land on the first unamed planet that has Oxygen levels
 Write a function that finds the oxygen level of the first safe planet - Oxygen between 19.5% and 23.5%
 */
 
-function safeLevels() {
 
-}
+  function safeLevels(oxygen) {
+    let safety = oxygen.find(oxygen =>{
+      if (oxygen > `19.5%` && oxygen < `23.5%`){
+       return oxygen;
+      }
+    })
+    return safety;
+    }
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
diff --git a/week-3/2-mandatory/2-bush-berries.js b/week-3/2-mandatory/2-bush-berries.js
index d900323..e3a5f1f 100644
--- a/week-3/2-mandatory/2-bush-berries.js
+++ b/week-3/2-mandatory/2-bush-berries.js
@@ -10,8 +10,12 @@
   Use the tests to confirm which message to return
 */
 
-function bushChecker() {
-
+function bushChecker(arr) {
+  let berry = arr.every(x => x==="pink");
+  if (berry === true) {
+    return "Bush is safe to eat from";
+  }
+   return "Toxic! Leave bush alone!";
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/week-3/2-mandatory/3-space-colonies.js b/week-3/2-mandatory/3-space-colonies.js
index f99891a..a5dbc2e 100644
--- a/week-3/2-mandatory/3-space-colonies.js
+++ b/week-3/2-mandatory/3-space-colonies.js
@@ -8,7 +8,12 @@
   NOTE: don't include any element that is not a "family".
 */
 
-function colonisers() {
+
+
+
+function colonisers(arr) {
+  let family = arr.filter(x=> x.length > 9 && x.charAt(0) === "A");
+  return family;
 
 }
 
diff --git a/week-3/2-mandatory/4-eligible-students.js b/week-3/2-mandatory/4-eligible-students.js
index 6424b01..b49e468 100644
--- a/week-3/2-mandatory/4-eligible-students.js
+++ b/week-3/2-mandatory/4-eligible-students.js
@@ -7,10 +7,23 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function eligibleStudents() {
 
+
+function eligibleStudents(arr) {
+  let result = arr.filter(checkTheAtendace);
+  function checkTheAtendace(students) {
+    return students[1] >= 8;
+  }
+console.log(result);
+  let getStudent = result.map(bringNames);
+  function bringNames(students) {
+ return students[0];
+  }
+console.log(getStudent);
+return getStudent;
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const attendances = [
diff --git a/week-3/2-mandatory/5-journey-planner.js b/week-3/2-mandatory/5-journey-planner.js
index 53499c3..88c4f6a 100644
--- a/week-3/2-mandatory/5-journey-planner.js
+++ b/week-3/2-mandatory/5-journey-planner.js
@@ -7,8 +7,16 @@
   NOTE: only the names should be returned, not the means of transport.
 */
 
-function journeyPlanner() {
 
+
+function journeyPlanner(location, transport) {
+  let avilabelLocations = [];
+for (i = 0; i < location.length; i++) {
+  if (location[i].includes(transport)) {
+    avilabelLocations.push(location[i][0]);
+  }
+}
+return avilabelLocations;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
diff --git a/week-3/2-mandatory/6-lane-names.js b/week-3/2-mandatory/6-lane-names.js
index eddfe44..6c1c5d8 100644
--- a/week-3/2-mandatory/6-lane-names.js
+++ b/week-3/2-mandatory/6-lane-names.js
@@ -4,10 +4,22 @@
   Write a function that will return all street names which contain 'Lane' in their name.
 */
 
-function getLanes() {
 
+
+
+function getLanes(arr) {
+    let street = [];  //blank array to push the new values in
+    let lane = arr.map(element => element.indexOf("Lane"));
+    for(let i = 0; i < arr.length; i++) {
+        if (lane[i] !== -1) {
+            street.push(arr[i]);
+        }
+    }
+    return street;
 }
 
+
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const streetNames = [
diff --git a/week-3/2-mandatory/7-password-validator.js b/week-3/2-mandatory/7-password-validator.js
index 57b3d53..40a41eb 100644
--- a/week-3/2-mandatory/7-password-validator.js
+++ b/week-3/2-mandatory/7-password-validator.js
@@ -22,9 +22,39 @@ PasswordValidationResult=  [false, false, false, false, true]
 
 */
 
-function validatePasswords(passwords) {
+// function validatePasswords(passwords) {
+
+// }
 
+function fiveOrMoreLetters(word) {
+  return word.length >= 5; 
+}
+function checkUpperCase(word) {
+let regex = /[A-Z]/;
+return regex.test(word);
+}
+function checkLowerCase(word) {
+let regex = /[a-z]/;
+return regex.test(word);
+}
+function checkNumbers(word) {
+let regex = /[0-9]/;
+return regex.test(word);
 }
+function checkSymbols(word) {
+let regex = /[!#$%.*&]/;
+return regex.test(word);
+}
+// function containsRepeat(word) {
+// }
+function validatePasswords(passwords) {
+return passwords.map(word => fiveOrMoreLetters(word) 
+&& checkUpperCase(word) 
+&& checkLowerCase(word) 
+&& checkNumbers(word)
+&& checkSymbols(word));
+}
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */