diff --git a/Week1/prep-exercises/1-traffic-light/traffic-light-1.js b/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
index f1d9169..0d57210 100644
--- a/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
+++ b/Week1/prep-exercises/1-traffic-light/traffic-light-1.js
@@ -12,6 +12,16 @@ while (rotations < 2) {
   const currentState = trafficLight.state;
   console.log("The traffic light is on", currentState);
 
+  if(currentState === 'green'){
+      trafficLight.state = 'orange';
+      console.log("The traffic light is on", currentState);
+    } else if(currentState === 'orange'){
+      trafficLight.state = 'red';
+      console.log("The traffic light is on", currentState);
+    } else if(currentState === 'red'){
+      rotations++;
+      trafficLight.state = 'green';
+  }
   // TODO
   // if the color is green, turn it orange
   // if the color is orange, turn it red
diff --git a/Week1/prep-exercises/1-traffic-light/traffic-light-2.js b/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
index 8c6ba95..6dedbeb 100644
--- a/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
+++ b/Week1/prep-exercises/1-traffic-light/traffic-light-2.js
@@ -14,6 +14,16 @@ while (cycle < 2) {
   const currentState = trafficLight.possibleStates[trafficLight.stateIndex];
   console.log("The traffic light is on", currentState);
 
+  if(currentState === 'green'){
+    trafficLight.stateIndex++;
+    console.log("The traffic light is on", currentState);
+  } else if(currentState === 'orange'){
+    trafficLight.stateIndex++;
+    console.log("The traffic light is on", currentState);
+  } else if(currentState === 'red'){
+    cycle++;
+    trafficLight.stateIndex -= 2;
+  }
   // TODO
   // if the color is green, turn it orange
   // if the color is orange, turn it red
diff --git a/Week2/prep-exercises/1-traffic-light/traffic-light.js b/Week2/prep-exercises/1-traffic-light/traffic-light.js
index f4a5c1a..592343c 100644
--- a/Week2/prep-exercises/1-traffic-light/traffic-light.js
+++ b/Week2/prep-exercises/1-traffic-light/traffic-light.js
@@ -6,28 +6,23 @@
  */
 
 function getCurrentState(trafficLight) {
-  // TODO
-  // Should return the current state (i.e. colour) of the `trafficLight`
-  // object passed as a parameter.
+  trafficLight.possibleStates = [...trafficLight.possibleStates, ...trafficLight.possibleStates];
+  return trafficLight.possibleStates[trafficLight.stateIndex];
 }
 
 function getNextStateIndex(trafficLight) {
-  // TODO
-  // Return the index of the next state of the `trafficLight` such that:
-  // - if the color is green, it will turn to orange
-  // - if the color is orange, it will turn to red
-  // - if the color is red, it will turn to green
+  if(getCurrentState(trafficLight) === 'green') {
+    return ++trafficLight.stateIndex;
+  } else if(getCurrentState(trafficLight) === 'orange') {
+    return ++trafficLight.stateIndex;
+  } else if(getCurrentState(trafficLight) === 'red') {
+    return ++trafficLight.stateIndex;
+  }
 }
 
-// This function loops for the number of seconds specified by the `secs`
-// parameter and then returns.
-// IMPORTANT: This is not the recommended way to implement 'waiting' in
-// JavaScript. You will learn better ways of doing this when you learn about
-// asynchronous code.
 function waitSync(secs) {
   const start = Date.now();
   while (Date.now() - start < secs * 1000) {
-    // nothing do to here
   }
 }
 
diff --git a/Week2/prep-exercises/2-experiments/index.js b/Week2/prep-exercises/2-experiments/index.js
index 7e5aa92..6645acd 100644
--- a/Week2/prep-exercises/2-experiments/index.js
+++ b/Week2/prep-exercises/2-experiments/index.js
@@ -3,27 +3,17 @@
 function runExperiment(sampleSize) {
   const valueCounts = [0, 0, 0, 0, 0, 0];
 
-  // TODO
-  // Write a for loop that iterates `sampleSize` times (sampleSize is a number).
-  // In each loop iteration:
-  //
-  // 1. Generate a random integer between 1 and 6 (as if throwing a six-sided die).
-  // 2. Add `1` to the element of the `valueCount` that corresponds to the random
-  //    value from the previous step. Use the first element of `valueCounts`
-  //    for keeping a count how many times the value 1 is thrown, the second
-  //    element for value 2, etc.
+  for(let i=0; i<sampleSize; i++){
+    const randomInt = Math.floor(Math.random()*6) + 1;
+    valueCounts[randomInt-1] +=1;
+  }
 
   const results = [];
 
-  // TODO
-  // Write a for..of loop for the `valueCounts` array created in the previous
-  // loop. In each loop iteration:
-  // 1. For each possible value of the die (1-6), compute the percentage of how
-  //    many times that value was thrown. Remember that the first value of
-  //    `valueCounts` represent the die value of 1, etc.
-  // 2. Convert the computed percentage to a number string with a precision of
-  //    two decimals, e.g. '14.60'.
-  // 3. Then push that string onto the `results` array.
+  for(const valueCount of valueCounts){
+      const percentage = 100*valueCount/sampleSize;
+      results.push(percentage.toFixed(2));
+  }
 
   return results;
 }
@@ -31,16 +21,9 @@ function runExperiment(sampleSize) {
 function main() {
   const sampleSizes = [100, 1000, 1000000];
 
-  // TODO
-  // Write a for..of loop that calls the `runExperiment()` function for each
-  // value of the `sampleSizes` array.
-  // Log the results of each experiment as well as the experiment size to the
-  // console.
-  // The expected output could look like this:
-  //
-  // [ '26.00', '17.00', '10.00', '19.00', '16.00', '12.00' ] 100
-  // [ '14.60', '17.10', '19.30', '15.50', '16.70', '16.80' ] 1000
-  // [ '16.71', '16.68', '16.69', '16.66', '16.67', '16.59' ] 1000000
+  for(const sampleSize of sampleSizes){
+    console.log(runExperiment(sampleSize), sampleSize);
+  }
 }
 
 main();
diff --git a/Week3/challenges/1-sum-entries.js b/Week3/challenges/1-sum-entries.js
index f7dd419..145dff6 100644
--- a/Week3/challenges/1-sum-entries.js
+++ b/Week3/challenges/1-sum-entries.js
@@ -9,9 +9,13 @@ Once you have found those numbers, multiply the numbers and store the result of
 
 const list = [1721, 979, 366, 299, 675, 1456];
 let result;
-    
-// Write your code here
 
+list.forEach((number, ind) => {
+  for(let i= ind+1; i<list.length; i++){
+    if(number + list[i] === 2020)
+    return result = number*list[i]
+  }
+})
 
 // TEST CODE, do not change
 console.assert(result === 514579, `The result is not correct, it is ${result}, but should be 514579`);
\ No newline at end of file
diff --git a/Week3/challenges/2-sum-three-entries.js b/Week3/challenges/2-sum-three-entries.js
index f5f8773..37da431 100644
--- a/Week3/challenges/2-sum-three-entries.js
+++ b/Week3/challenges/2-sum-three-entries.js
@@ -10,8 +10,14 @@ Once you have found those numbers, multiply the numbers and store the result of
 const list = [1721, 979, 366, 299, 675, 1456];
 let result;
     
-// Write your code here
-
+list.forEach((number, ind) => {
+  for(let i= ind+1; i<list.length; i++){
+    for(let j = i+1; j<list.length; j++){
+    if(number + list[i] + list[j] === 2020)
+    return result = number*list[i]*list[j]
+  }
+}
+})
 
 // TEST CODE, do not change
 console.assert(result === 241861950, `The result is not correct, it is ${result}, but should be 241861950`);
\ No newline at end of file
diff --git a/Week3/challenges/3-password-validation.js b/Week3/challenges/3-password-validation.js
index fa7ad11..10d070b 100644
--- a/Week3/challenges/3-password-validation.js
+++ b/Week3/challenges/3-password-validation.js
@@ -3,7 +3,8 @@
  * Credit to https://adventofcode.com/ for this exercise
  * 
  * Each object in the passwordList gives a password policy and then the password.
- * The times field says the minimal and maximal amount of times the letter should be in the password. So 1-3 means at least 1 time, at most 3 times.
+ * The times field says the minimal and maximal amount of times the letter should be in the password. 
+ * So 1-3 means at least 1 time, at most 3 times.
  * The letter field gives which letter should be counted
  * The password field gives the password
  * 
@@ -20,4 +21,18 @@ const passwordList = [
     { times: '1-3', letter: 'a', password: 'abcde'},
     { times: '1-3', letter: 'b', password: 'cdefg'},
     { times: '2-9', letter: 'c', password: 'ccccccccc'}
-];
\ No newline at end of file
+];
+
+passwordList.forEach(passwordPolicy =>{
+  let count = 0;
+  for(let i=0; i<passwordPolicy.password.length; i++){
+  if(passwordPolicy.password[i] === passwordPolicy.letter) {
+    count +=1;
+  }
+}
+  if(count >= parseInt(passwordPolicy.times[0]) && count <= parseInt(passwordPolicy.times[2])){
+    console.log(`${passwordPolicy.password} is VALID, ${passwordPolicy.letter} is present ${count} times and should have been present at least ${parseInt(passwordPolicy.times[0])} and at most ${parseInt(passwordPolicy.times[2])} times`);
+  } else{
+    console.log(`${passwordPolicy.password} is INVALID, ${passwordPolicy.letter} is present ${count} times and should have been present at least ${parseInt(passwordPolicy.times[0])} and at most ${parseInt(passwordPolicy.times[2])} times`);
+  }
+})
\ No newline at end of file
diff --git a/Week3/challenges/4-bank-account.js b/Week3/challenges/4-bank-account.js
index 8f0f035..3dc8b89 100644
--- a/Week3/challenges/4-bank-account.js
+++ b/Week3/challenges/4-bank-account.js
@@ -27,11 +27,28 @@ const bankAccount = {
   ],
 };
 
+const updateBankAccount = (amount, reason) => {
+  bankAccount.currentBalance = bankAccount.currentBalance - amount;
+    bankAccount.transactions.push({prevAmount: bankAccount.currentBalance + amount, 
+      newAmount: bankAccount.currentBalance,
+      reason: reason});
+};
+
 const donateMoney = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if(bankAccount.currentBalance>amount){
+    onSuccess();
+    updateBankAccount(amount, reason = 'Donation');
+  } else{
+    onFail();
+  }
 };
 const payRent = (amount, onSuccess, onFail) => {
-  // TODO complete this function
+  if(bankAccount.currentBalance>amount){
+    onSuccess();
+    updateBankAccount(amount, reason = 'Rent');
+  } else{
+    onFail();
+  }
 };
 
 /**
diff --git a/Week3/prep-exercises/1-hyf-program/1-find-mentors.js b/Week3/prep-exercises/1-hyf-program/1-find-mentors.js
index 72baa61..6a79a23 100644
--- a/Week3/prep-exercises/1-hyf-program/1-find-mentors.js
+++ b/Week3/prep-exercises/1-hyf-program/1-find-mentors.js
@@ -8,10 +8,13 @@ import { modules, students, mentors, classes } from "./hyf.js";
  *  ['John', 'Mary']
  */
 const possibleMentorsForModule = (moduleName) => {
-  // TODO complete this function
+  const moduleTeachers = mentors
+  .filter(mentor => {return mentor.canTeach.includes(moduleName)})
+  .map(mentor => {return mentor.name});
+  return moduleTeachers;
 };
 // You can uncomment out this line to try your function
-// console.log(possibleMentorsForModule('using-apis'));
+console.log(possibleMentorsForModule('using-apis'));
 
 /**
  * Tjebbe wants to make it even easier for himself.
@@ -20,7 +23,9 @@ const possibleMentorsForModule = (moduleName) => {
  * It should return a single name.
  */
 const findMentorForModule = (moduleName) => {
-  // TODO complete this function
+  const moduleMentor = possibleMentorsForModule(moduleName);
+  const random = moduleMentor[Math.floor(Math.random()*moduleMentor.length)];
+  return random;
 };
 // You can uncomment out this line to try your function
-// console.log(findMentorForModule('javascript'));
+console.log(findMentorForModule('javascript'));
diff --git a/Week3/prep-exercises/1-hyf-program/2-class-list.js b/Week3/prep-exercises/1-hyf-program/2-class-list.js
index 44d2798..144e9a3 100644
--- a/Week3/prep-exercises/1-hyf-program/2-class-list.js
+++ b/Week3/prep-exercises/1-hyf-program/2-class-list.js
@@ -12,10 +12,26 @@ import { modules, students, mentors, classes } from "./hyf.js";
  *  [{ name: 'John', role: 'student' }, { name: 'Mary', role: 'mentor' }]
  */
 const getPeopleOfClass = (className) => {
-  // TODO complete this function
+
+  const currentStudents = students.filter(student => {return student.class.includes(className)});
+  const currentStudentsRole = currentStudents.map(student => {
+    student.role = 'student';
+    return {name: student.name, role: student.role}});
+
+  const currentModule = classes
+  .filter(class_ => {return class_.name === className;})
+  .map(class_ => {return class_.currentModule});
+
+  const currentMentor = mentors
+  .filter(mentor => {return mentor.nowTeaching === currentModule.toString()})
+  .map(mentor => {
+    mentor.role = 'mentor';
+    return {name: mentor.name, role: mentor.role}});
+  
+  return [...currentStudentsRole,...currentMentor];
 };
 // You can uncomment out this line to try your function
-// console.log(getPeopleOfClass('class34'));
+console.log(getPeopleOfClass('class34'));
 
 /**
  * We would like to have a complete overview of the current active classes.
@@ -30,7 +46,16 @@ const getPeopleOfClass = (className) => {
  *  }
  */
 const getActiveClasses = () => {
-  // TODO complete this function
+  const activeClasses = classes
+  .filter(class_ => {return class_.active === true;})
+  .map(class_ => {return class_.name});
+  
+  const obj = {};
+
+  const people = activeClasses.map(activeClass => {
+    return obj[activeClass] = getPeopleOfClass(activeClass);});
+
+  return obj;
 };
 // You can uncomment out this line to try your function
-// console.log(getActiveClasses());
+console.log(getActiveClasses());
diff --git a/Week4/prep-exercises/1-wallet/euroFormatter.js b/Week4/prep-exercises/1-wallet/euroFormatter.mjs
similarity index 100%
rename from Week4/prep-exercises/1-wallet/euroFormatter.js
rename to Week4/prep-exercises/1-wallet/euroFormatter.mjs
diff --git a/Week4/prep-exercises/1-wallet/ex1-closure-example.js b/Week4/prep-exercises/1-wallet/ex1-closure-example.mjs
similarity index 94%
rename from Week4/prep-exercises/1-wallet/ex1-closure-example.js
rename to Week4/prep-exercises/1-wallet/ex1-closure-example.mjs
index e98b056..56a79eb 100644
--- a/Week4/prep-exercises/1-wallet/ex1-closure-example.js
+++ b/Week4/prep-exercises/1-wallet/ex1-closure-example.mjs
@@ -1,7 +1,8 @@
-import eurosFormatter from "./euroFormatter.js";
+import eurosFormatter from "./euroFormatter.mjs";
 
 /**
- * This is the closure way of doing things and we have already completed it for you so you don't need to do anything.
+ * This is the closure way of doing things and we have already completed it for you so 
+ * you don't need to do anything.
  * We leave it here as an example of how your other implementations should work!
  */
 
diff --git a/Week4/prep-exercises/1-wallet/ex2-classes.js b/Week4/prep-exercises/1-wallet/ex2-classes.mjs
similarity index 63%
rename from Week4/prep-exercises/1-wallet/ex2-classes.js
rename to Week4/prep-exercises/1-wallet/ex2-classes.mjs
index f016137..3c50b3a 100644
--- a/Week4/prep-exercises/1-wallet/ex2-classes.js
+++ b/Week4/prep-exercises/1-wallet/ex2-classes.mjs
@@ -1,12 +1,16 @@
-import eurosFormatter from './euroFormatter.js';
+import eurosFormatter from './euroFormatter.mjs';
 
 class Wallet {
   #name;
   #cash;
+  #dailyAllowance;
+  #dayTotalWithdrawals;
 
   constructor(name, cash) {
     this.#name = name;
     this.#cash = cash;
+    this.#dailyAllowance = 40;
+    this.#dayTotalWithdrawals = 0;
   }
 
   get name() {
@@ -22,8 +26,13 @@ class Wallet {
       console.log(`Insufficient funds!`);
       return 0;
     }
+    if(this.#dayTotalWithdrawals + amount > this.#dailyAllowance){
+      console.log(`Insufficient remaining daily allowance!`);
+      return 0;
+    }
 
     this.#cash -= amount;
+    this.#dayTotalWithdrawals += amount;
     return amount;
   }
 
@@ -37,6 +46,17 @@ class Wallet {
     wallet.deposit(withdrawnAmount);
   }
 
+  resetDailyAllowance(){
+    this.#dayTotalWithdrawals = 0;
+  }
+
+  setDailyAllowance(newAllowance){
+    this.#dailyAllowance = newAllowance;
+    console.log(
+      `Daily allowance set to: ${eurosFormatter.format(newAllowance)}`
+    );
+  }
+
   reportBalance() {
     console.log(
       `Name: ${this.name}, balance: ${eurosFormatter.format(this.#cash)}`
@@ -50,6 +70,9 @@ function main() {
   const walletJane = new Wallet('Jane', 20);
 
   walletJack.transferInto(walletJoe, 50);
+  walletJack.setDailyAllowance(80);
+  walletJack.transferInto(walletJoe, 50);
+  
   walletJane.transferInto(walletJoe, 25);
 
   walletJane.deposit(20);
diff --git a/Week4/prep-exercises/1-wallet/ex3-object.js b/Week4/prep-exercises/1-wallet/ex3-object.mjs
similarity index 65%
rename from Week4/prep-exercises/1-wallet/ex3-object.js
rename to Week4/prep-exercises/1-wallet/ex3-object.mjs
index e94faac..9c26005 100644
--- a/Week4/prep-exercises/1-wallet/ex3-object.js
+++ b/Week4/prep-exercises/1-wallet/ex3-object.mjs
@@ -1,9 +1,11 @@
-import eurosFormatter from './euroFormatter.js';
+import eurosFormatter from './euroFormatter.mjs';
 
 function createWallet(name, cash = 0) {
   return {
     _name: name,
     _cash: cash,
+    _dailyAllowance: 40,
+    _dayTotalWithdrawals: 0,
 
     deposit: function (amount) {
       this._cash += amount;
@@ -14,8 +16,13 @@ function createWallet(name, cash = 0) {
         console.log(`Insufficient funds!`);
         return 0;
       }
+      if(this._dayTotalWithdrawals + amount > this._dailyAllowance){
+        console.log(`Insufficient remaining daily allowance!`);
+        return 0;
+      }
 
       this._cash -= amount;
+      this._dayTotalWithdrawals += amount;
       return amount;
     },
 
@@ -29,6 +36,17 @@ function createWallet(name, cash = 0) {
       wallet.deposit(withdrawnAmount);
     },
 
+    resetDailyAllowance: function() {
+      this._dayTotalWithdrawals = 0;
+    },
+
+    setDailyAllowance: function (newAllowance){
+      this._dailyAllowance = newAllowance;
+      console.log(
+        `Daily allowance set to: ${eurosFormatter.format(newAllowance)}`
+      );
+    },
+
     reportBalance: function () {
       console.log(
         `Name: ${this._name}, balance: ${eurosFormatter.format(this._cash)}`
@@ -47,6 +65,9 @@ function main() {
   const walletJane = createWallet('Jane', 20);
 
   walletJack.transferInto(walletJoe, 50);
+  walletJack.setDailyAllowance(80);
+  walletJack.transferInto(walletJoe, 50);
+  
   walletJane.transferInto(walletJoe, 25);
 
   walletJane.deposit(20);
diff --git a/Week4/prep-exercises/1-wallet/ex4-object-shared-methods.js b/Week4/prep-exercises/1-wallet/ex4-object-shared-methods.mjs
similarity index 64%
rename from Week4/prep-exercises/1-wallet/ex4-object-shared-methods.js
rename to Week4/prep-exercises/1-wallet/ex4-object-shared-methods.mjs
index bd4fd20..4e5a704 100644
--- a/Week4/prep-exercises/1-wallet/ex4-object-shared-methods.js
+++ b/Week4/prep-exercises/1-wallet/ex4-object-shared-methods.mjs
@@ -1,4 +1,4 @@
-import eurosFormatter from './euroFormatter.js';
+import eurosFormatter from './euroFormatter.mjs';
 
 function deposit(amount) {
   this._cash += amount;
@@ -9,8 +9,13 @@ function withdraw(amount) {
     console.log(`Insufficient funds!`);
     return 0;
   }
+  if(this._dayTotalWithdrawals + amount > this._dailyAllowance){  
+    console.log(`Insufficient remaining daily allowance!`);
+    return 0;
+  }
 
   this._cash -= amount;
+  this._dayTotalWithdrawals += amount;
   return amount;
 }
 
@@ -24,6 +29,17 @@ function transferInto(wallet, amount) {
   wallet.deposit(withdrawnAmount);
 }
 
+function resetDailyAllowance() {
+    this._dayTotalWithdrawals = 0;
+}
+
+function setDailyAllowance(newAllowance) {
+    this._dailyAllowance = newAllowance;
+    console.log(
+      `Daily allowance set to: ${eurosFormatter.format(newAllowance)}`
+    );
+}
+
 function reportBalance() {
   console.log(
     `Name: ${this._name}, balance: ${eurosFormatter.format(this._cash)}`
@@ -38,9 +54,13 @@ function createWallet(name, cash = 0) {
   return {
     _name: name,
     _cash: cash,
+    _dailyAllowance: 40,
+    _dayTotalWithdrawals: 0,
     deposit,
     withdraw,
     transferInto,
+    resetDailyAllowance,
+    setDailyAllowance,
     reportBalance,
     getName,
   };
@@ -52,6 +72,9 @@ function main() {
   const walletJane = createWallet('Jane', 20);
 
   walletJack.transferInto(walletJoe, 50);
+  walletJack.setDailyAllowance(80);
+  walletJack.transferInto(walletJoe, 50);
+  
   walletJane.transferInto(walletJoe, 25);
 
   walletJane.deposit(20);
diff --git a/Week4/prep-exercises/1-wallet/ex5-prototype.js b/Week4/prep-exercises/1-wallet/ex5-prototype.mjs
similarity index 65%
rename from Week4/prep-exercises/1-wallet/ex5-prototype.js
rename to Week4/prep-exercises/1-wallet/ex5-prototype.mjs
index 7cba410..932786c 100644
--- a/Week4/prep-exercises/1-wallet/ex5-prototype.js
+++ b/Week4/prep-exercises/1-wallet/ex5-prototype.mjs
@@ -1,8 +1,10 @@
-import eurosFormatter from './euroFormatter.js';
+import eurosFormatter from './euroFormatter.mjs';
 
 function Wallet(name, cash) {
   this._name = name;
   this._cash = cash;
+  this._dailyAllowance = 40;
+  this._dayTotalWithdrawals = 0;
 }
 
 Wallet.prototype.deposit = function (amount) {
@@ -14,8 +16,13 @@ Wallet.prototype.withdraw = function (amount) {
     console.log(`Insufficient funds!`);
     return 0;
   }
+  if(this._dayTotalWithdrawals + amount > this._dailyAllowance){
+    console.log(`Insufficient remaining daily allowance!`);
+    return 0;
+  }
 
   this._cash -= amount;
+  this._dayTotalWithdrawals += amount;
   return amount;
 };
 
@@ -29,6 +36,17 @@ Wallet.prototype.transferInto = function (wallet, amount) {
   wallet.deposit(withdrawnAmount);
 };
 
+Wallet.prototype.resetDailyAllowance = function(){
+  this._dayTotalWithdrawals = 0;
+}
+
+Wallet.prototype.setDailyAllowance = function (newAllowance){
+  this._dailyAllowance = newAllowance;
+  console.log(
+    `Daily allowance set to: ${eurosFormatter.format(newAllowance)}`
+  );
+}
+
 Wallet.prototype.reportBalance = function () {
   console.log(
     `Name: ${this._name}, balance: ${eurosFormatter.format(this._cash)}`
@@ -45,6 +63,9 @@ function main() {
   const walletJane = new Wallet('Jane', 20);
 
   walletJack.transferInto(walletJoe, 50);
+  walletJack.setDailyAllowance(80);
+  walletJack.transferInto(walletJoe, 50);
+  
   walletJane.transferInto(walletJoe, 25);
 
   walletJane.deposit(20);