diff --git a/week-3/1-exercises/A-array-find/exercise.js b/week-3/1-exercises/A-array-find/exercise.js
index d7fd51f..9f6932f 100644
--- a/week-3/1-exercises/A-array-find/exercise.js
+++ b/week-3/1-exercises/A-array-find/exercise.js
@@ -5,9 +5,23 @@
 
 // write your code here
 
-var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
+var names = [
+  "Rakesh",
+  "Antonio",
+  "Alexandra",
+  "Andronicus",
+  "Annam",
+  "Mikey",
+  "Anastasia",
+  "Karim",
+  "Ahmed",
+];
 
-var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
+function findLongNameThatStartsWithA(names) {
+  return names[0] === "A" && names.length > 7;
+}
+
+var longNameThatStartsWithA = names.find(findLongNameThatStartsWithA);
 
 console.log(longNameThatStartsWithA);
 
diff --git a/week-3/1-exercises/B-array-some/exercise.js b/week-3/1-exercises/B-array-some/exercise.js
index 965c052..cfd4242 100644
--- a/week-3/1-exercises/B-array-some/exercise.js
+++ b/week-3/1-exercises/B-array-some/exercise.js
@@ -11,11 +11,18 @@ var pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
 // If there is a null value in the array exit the program with the error code
 // 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) {
+//null checker function for me to understand clearer
+function isItNull(num) {
+  return num === null;
+}
+
+var pairs = pairsByIndex.map(function (indexes) {
+  if (isItNull(indexes)) {
+    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..934d97b 100644
--- a/week-3/1-exercises/C-array-every/exercise.js
+++ b/week-3/1-exercises/C-array-every/exercise.js
@@ -5,7 +5,11 @@
 var students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 var group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-var groupIsOnlyStudents; // complete this statement
+function isGroupStudentsOnly(name) {
+  return students.includes(name);
+}
+
+var groupIsOnlyStudents = group.every(isGroupStudentsOnly); // complete this statement
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");
diff --git a/week-3/1-exercises/D-array-filter/exercise.js b/week-3/1-exercises/D-array-filter/exercise.js
index 6e32cc6..b98d835 100644
--- a/week-3/1-exercises/D-array-filter/exercise.js
+++ b/week-3/1-exercises/D-array-filter/exercise.js
@@ -8,12 +8,16 @@
 
 var pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-var pairsByIndex; // Complete this statement
+function isItPairs(pair) {
+  return Array.isArray(pair) && pair.length === 2;
+}
+
+var pairsByIndex = pairsByIndexRaw.filter(isItPairs);
 
 var students = ["Islam", "Lesley", "Harun", "Rukmini"];
 var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 
-var pairs = pairsByIndex.map(function(indexes) {
+var pairs = pairsByIndex.map(function (indexes) {
   var student = students[indexes[0]];
   var mentor = mentors[indexes[1]];
   return [student, mentor];
diff --git a/week-3/1-exercises/E-array-map/exercise.js b/week-3/1-exercises/E-array-map/exercise.js
index 2835e92..174fac9 100644
--- a/week-3/1-exercises/E-array-map/exercise.js
+++ b/week-3/1-exercises/E-array-map/exercise.js
@@ -3,3 +3,24 @@
 
 var numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
+let multiplyByHundred = numbers.map(function multiplies(number) {
+  return number * 100;
+});
+
+console.log(multiplyByHundred);
+
+let multiplyByHundredSecond = numbers.map(function (number) {
+  return number * 100;
+});
+
+console.log(multiplyByHundredSecond);
+
+let multiplyByHundredThird = numbers.map((number) => {
+  return number * 100;
+});
+
+console.log(multiplyByHundredThird);
+
+let multiplyByHundredFourth = numbers.map((number) => number * 100);
+
+console.log(multiplyByHundredFourth);
diff --git a/week-3/1-exercises/F-array-forEach/exercise.js b/week-3/1-exercises/F-array-forEach/exercise.js
index e83e2df..8624b2f 100644
--- a/week-3/1-exercises/F-array-forEach/exercise.js
+++ b/week-3/1-exercises/F-array-forEach/exercise.js
@@ -9,6 +9,18 @@
 
 var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+arr.forEach((number) => {
+  if (number % 3 === 0 && number % 5 === 0) {
+    console.log("FizzBuzz");
+  } else if (number % 3 === 0) {
+    console.log("Fizz");
+  } else if (number % 5 === 0) {
+    console.log("Buzz");
+  } else {
+    console.log(number);
+  }
+});
+
 /* EXPECTED OUTPUT */
 
 /*
diff --git a/week-3/1-exercises/G-array-methods/exercise.js b/week-3/1-exercises/G-array-methods/exercise.js
index 44e9c80..6a8e4b3 100644
--- a/week-3/1-exercises/G-array-methods/exercise.js
+++ b/week-3/1-exercises/G-array-methods/exercise.js
@@ -4,7 +4,7 @@
 */
 
 var numbers = [3, 2, 1];
-var sortedNumbers; // complete this statement
+var sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-3/1-exercises/G-array-methods/exercise2.js b/week-3/1-exercises/G-array-methods/exercise2.js
index 3dd24a1..dd87089 100644
--- a/week-3/1-exercises/G-array-methods/exercise2.js
+++ b/week-3/1-exercises/G-array-methods/exercise2.js
@@ -7,7 +7,7 @@
 var mentors = ["Daniel", "Irina", "Rares"];
 var students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-var everyone; // complete this statement
+var everyone = mentors.concat(students); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-3/1-exercises/H-array-methods-2/exercise.js b/week-3/1-exercises/H-array-methods-2/exercise.js
index d36303b..df1fe87 100644
--- a/week-3/1-exercises/H-array-methods-2/exercise.js
+++ b/week-3/1-exercises/H-array-methods-2/exercise.js
@@ -12,11 +12,11 @@ var everyone = [
   "Rukmini",
   "Abdul",
   "Austine",
-  "Swathi"
+  "Swathi",
 ];
 
-var firstFive; // complete this statement
-var lastFive; // complete this statement
+var firstFive = everyone.slice(0, 5); // complete this statement
+var lastFive = everyone.slice(-5); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-3/1-exercises/H-array-methods-2/exercise2.js b/week-3/1-exercises/H-array-methods-2/exercise2.js
index b7be576..3abf9f6 100644
--- a/week-3/1-exercises/H-array-methods-2/exercise2.js
+++ b/week-3/1-exercises/H-array-methods-2/exercise2.js
@@ -7,7 +7,11 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+  let newArr = str.split("");
+  newArr[0] = newArr[0].toUpperCase();
+  return newArr.join("");
+}
 
 /* 
   DO NOT EDIT BELOW THIS LINE
diff --git a/week-3/1-exercises/H-array-methods-2/exercise3.js b/week-3/1-exercises/H-array-methods-2/exercise3.js
index 82e9dd8..950ac1b 100644
--- a/week-3/1-exercises/H-array-methods-2/exercise3.js
+++ b/week-3/1-exercises/H-array-methods-2/exercise3.js
@@ -7,7 +7,7 @@
 var ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+  return ukNations.includes(country);
 }
 
 /* 
diff --git a/week-3/2-mandatory/1-oxygen-levels.js b/week-3/2-mandatory/1-oxygen-levels.js
index f9d745f..84126d9 100644
--- a/week-3/2-mandatory/1-oxygen-levels.js
+++ b/week-3/2-mandatory/1-oxygen-levels.js
@@ -9,8 +9,9 @@ To be safe to land on, a planet needs to have an Oxygen level between 19.5% and
 Write a function that finds the first safe oxygen level in the array - Oxygen between 19.5% and 23.5%
 */
 
-function safeLevels() {
-
+function safeLevels(level) {
+  let levelSafety = level.find((level) => level > "19.5%" && level < "23.5%");
+  return levelSafety;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -19,33 +20,23 @@ const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"];
 const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"];
 const oxygenLevels3 = ["200%", "21.1%"];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (actual === expected) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (actual === expected) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
-test(
-    "safeLevels function works - case 1",
-    safeLevels(oxygenLevels1),
-    "19.9%"
-);
-
-test(
-    "safeLevels function works - case 2",
-    safeLevels(oxygenLevels2),
-    "20.2%"
-);
-
-test(
-    "safeLevels function works - case 3",
-    safeLevels(oxygenLevels3),
-    "21.1%"
-);
+test("safeLevels function works - case 1", safeLevels(oxygenLevels1), "19.9%");
+
+test("safeLevels function works - case 2", safeLevels(oxygenLevels2), "20.2%");
+
+test("safeLevels function works - case 3", safeLevels(oxygenLevels3), "21.1%");
diff --git a/week-3/2-mandatory/2-bush-berries.js b/week-3/2-mandatory/2-bush-berries.js
index aca45ad..0594aee 100644
--- a/week-3/2-mandatory/2-bush-berries.js
+++ b/week-3/2-mandatory/2-bush-berries.js
@@ -10,26 +10,34 @@
   Use the tests to confirm which message to return
 */
 
-function bushChecker() {
-
+function bushChecker(bush) {
+  let allPink = bush.every((item) => item === "pink");
+
+  if (allPink) {
+    return "Bush is safe to eat from";
+  } else {
+    return "Toxic! Leave bush alone!";
+  }
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-let bushBerryColours1 = ["pink", "pink", "pink", "neon", "pink", "transparent"]
-let bushBerryColours2 = ["pink", "pink", "pink", "pink"]
+let bushBerryColours1 = ["pink", "pink", "pink", "neon", "pink", "transparent"];
+let bushBerryColours2 = ["pink", "pink", "pink", "pink"];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (actual === expected) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (actual === expected) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
 test(
diff --git a/week-3/2-mandatory/3-space-colonies.js b/week-3/2-mandatory/3-space-colonies.js
index 239eddd..94ccd2a 100644
--- a/week-3/2-mandatory/3-space-colonies.js
+++ b/week-3/2-mandatory/3-space-colonies.js
@@ -8,8 +8,8 @@
   NOTE: don't include any element that is not a "family".
 */
 
-function colonisers() {
-
+function colonisers(name) {
+  return name.filter((name) => name[0] === "A" && name.includes("family"));
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -26,24 +26,26 @@ const voyagers = [
   "Asimov",
   "Oscar family",
   "Avery family",
-  "Archer family"
+  "Archer family",
 ];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (util.isDeepStrictEqual(actual, expected)) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (util.isDeepStrictEqual(actual, expected)) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
-test(
-  "colonisers function works",
-  colonisers(voyagers),
-  ["Adam family", "Avery family", "Archer family"]
-)
+test("colonisers function works", colonisers(voyagers), [
+  "Adam family",
+  "Avery family",
+  "Archer family",
+]);
diff --git a/week-3/2-mandatory/4-eligible-students.js b/week-3/2-mandatory/4-eligible-students.js
index d8fe052..3a19a0a 100644
--- a/week-3/2-mandatory/4-eligible-students.js
+++ b/week-3/2-mandatory/4-eligible-students.js
@@ -7,8 +7,10 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function eligibleStudents() {
-
+function eligibleStudents(attendance) {
+  return attendance
+    .filter((classes) => classes[1] >= 8)
+    .map((classes) => classes[0]);
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -19,23 +21,27 @@ const attendances = [
   ["Elamin", 6],
   ["Adam", 7],
   ["Tayoa", 11],
-  ["Nina", 10]
-]
+  ["Nina", 10],
+];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (util.isDeepStrictEqual(actual, expected)) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (util.isDeepStrictEqual(actual, expected)) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
-test("eligibleStudents function works",
-  eligibleStudents(attendances),
-  ["Ahmed", "Clement", "Tayoa", "Nina"]
-);
+test("eligibleStudents function works", eligibleStudents(attendances), [
+  "Ahmed",
+  "Clement",
+  "Tayoa",
+  "Nina",
+]);
diff --git a/week-3/2-mandatory/5-journey-planner.js b/week-3/2-mandatory/5-journey-planner.js
index 816637d..022e0dd 100644
--- a/week-3/2-mandatory/5-journey-planner.js
+++ b/week-3/2-mandatory/5-journey-planner.js
@@ -7,7 +7,8 @@
   NOTE: only the names should be returned, not the means of transport.
 */
 
-function journeyPlanner() {
+function journeyPlanner(location, transport) {
+  return location.filter((lt) => lt.includes(transport)).map((lt) => lt[0]);
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -17,19 +18,21 @@ const londonLocations = [
   ["Greenwich", "bus", "river boat", "dlr", "air line", "tube"],
   ["London Bridge", "tube", "river boat"],
   ["Tower Bridge", "tube", "bus"],
-]
+];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (util.isDeepStrictEqual(actual, expected)) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (util.isDeepStrictEqual(actual, expected)) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
 test(
diff --git a/week-3/2-mandatory/6-lane-names.js b/week-3/2-mandatory/6-lane-names.js
index ef4e1c5..3022c6a 100644
--- a/week-3/2-mandatory/6-lane-names.js
+++ b/week-3/2-mandatory/6-lane-names.js
@@ -4,35 +4,36 @@
   Write a function that will return all street names which contain 'Lane' in their name.
 */
 
-function getLanes() {
-
+function getLanes(street) {
+  return street.filter((name) => name.includes("Lane"));
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 const streetNames = [
-    "Abchurch Lane",
-    "Adam's Court",
-    "Addle Hill",
-    "Addle Lane",
-    "Alban Highwalk"
-]
+  "Abchurch Lane",
+  "Adam's Court",
+  "Addle Hill",
+  "Addle Lane",
+  "Alban Highwalk",
+];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (util.isDeepStrictEqual(actual, expected)) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
-
-    console.log(`${test_name}: ${status}`);
+  let status;
+  if (util.isDeepStrictEqual(actual, expected)) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
+
+  console.log(`${test_name}: ${status}`);
 }
 
-test(
-  "getLanes function works",
-  getLanes(streetNames),
-  ["Abchurch Lane", "Addle Lane"]
-);
+test("getLanes function works", getLanes(streetNames), [
+  "Abchurch Lane",
+  "Addle Lane",
+]);
diff --git a/week-3/2-mandatory/7-password-validator.js b/week-3/2-mandatory/7-password-validator.js
index 8f9e597..f3e04db 100644
--- a/week-3/2-mandatory/7-password-validator.js
+++ b/week-3/2-mandatory/7-password-validator.js
@@ -22,33 +22,70 @@ PasswordValidationResult=  [false, false, false, false, true]
 
 */
 
-function validatePasswords(passwords) {
+function validatePasswords(pws) {
+  function validity(pw) {
+    //at least 5 characters
+    function minFive(pw) {
+      return pw.length >= 5;
+    }
+    //least one English uppercase letter (A-Z)
+    function upperCase(pw) {
+      return /[A-Z]/.test(pw);
+    }
+    //least one English lowercase letter (a-z)
+    function lowerCase(pw) {
+      return /[a-z]/.test(pw);
+    }
+    //least one number (0-9)
+    function numbers(pw) {
+      return /[0-9]/.test(pw);
+    }
+    //least one non-alphanumeric symbol ("!", "#", "$", "%", ".", "*", "&")
+    function specialChara(pw) {
+      return /[!#$%.]/.test(pw);
+    }
+
+    return (
+      minFive(pw) &&
+      upperCase(pw) &&
+      lowerCase(pw) &&
+      numbers(pw) &&
+      specialChara(pw)
+    );
+  }
+  //when it first appears
+  function first(fullPw, pw, i) {
+    return fullPw.indexOf(pw) === i;
+  }
 
+  return pws.map((pw, i) => validity(pw) && first(pws, pw, i));
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-const passwords1 = ["Se%5", "TktE.TJTU", "384#HsHF", "dvyyeyy!5", "tryT3729"]
-const passwords2 = ["StUFf27%", "Pl3nty!", "Jai33", "shajsaUA**&&", "Pl3nty!"]
+const passwords1 = ["Se%5", "TktE.TJTU", "384#HsHF", "dvyyeyy!5", "tryT3729"];
+const passwords2 = ["StUFf27%", "Pl3nty!", "Jai33", "shajsaUA**&&", "Pl3nty!"];
 
-const util = require('util');
+const util = require("util");
 
 function test(test_name, actual, expected) {
-    let status;
-    if (util.isDeepStrictEqual(actual, expected)) {
-        status = "PASSED";
-    } else {
-        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
-    }
+  let status;
+  if (util.isDeepStrictEqual(actual, expected)) {
+    status = "PASSED";
+  } else {
+    status = `FAILED: expected: ${util.inspect(
+      expected
+    )} but your function returned: ${util.inspect(actual)}`;
+  }
 
-    console.log(`${test_name}: ${status}`);
+  console.log(`${test_name}: ${status}`);
 }
 
 test(
   "validatePasswords function works - case 1",
   validatePasswords(passwords1),
   [false, false, true, false, false]
- );
+);
 
 test(
   "validatePasswords function works - case 2",