diff --git a/Week2/homework/maartjes-work.js b/Week2/homework/maartjes-work.js
index 49772eb44..f85a399d4 100644
--- a/Week2/homework/maartjes-work.js
+++ b/Week2/homework/maartjes-work.js
@@ -45,17 +45,50 @@ const tuesday = [
 const maartjesTasks = monday.concat(tuesday);
 const maartjesHourlyRate = 20;
 
-function computeEarnings(tasks, hourlyRate) {
-  // Replace this comment and the next line with your code
-  console.log(tasks, hourlyRate);
-}
+-------------------------------------------First Solustion------------------------------------------------------------------
+//Map the tasks to durations in hours.
+let tasksInHour = maartjesTasks.map(tasks => tasks.duration / 60);
+
+//Filter out everything that took less than two hours
+let longTasks = tasksInHour.filter(task => {
+  return task >= 2;
+});
+
+//Multiply the each duration by a per-hour rate for billing (use €20/hour) and sum it all up
+let profits = longTasks.map(task => {
+  return task * 20;
+});
+
+let totalProfit = 0;
+profits.forEach(function(profit) {
+  totalProfit += profit;
+});
 
-// eslint-disable-next-line no-unused-vars
-const earnings = computeEarnings(maartjesTasks, maartjesHourlyRate);
+//Output a formatted Euro amount, rounded to Euro cents, e.g: €11.34
+let roundedTotalProfit = totalProfit.toFixed(2);
 
 // add code to convert `earnings` to a string rounded to two decimals (euro cents)
+console.log(`Maartje has earned €${roundedTotalProfit}`);
+
+
+------------------------------------------Second Solution-------------------------------------------------------------------
+function computeEarnings(tasks, hourlyRate) {
+    let profits = [];
+    tasks.forEach(function(task) {
+      let duration = task.duration / 60;
+      if (duration >= 2) {
+        profits.push(duration * hourlyRate);
+      }
+    });
+    let totalProfits = profits.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
+    return totalProfits;
+  }
+
+  // eslint-disable-next-line no-unused-vars
+  const earnings = computeEarnings(maartjesTasks, maartjesHourlyRate).toFixed(2);
 
-console.log(`Maartje has earned €${'replace this string with the earnings rounded to euro cents'}`);
+  // add code to convert `earnings` to a string rounded to two decimals (euro cents)
+  console.log(`Maartje has earned €${earnings}`);
 
 // Do not change or remove anything below this line
 module.exports = {
diff --git a/Week2/homework/map-filter.js b/Week2/homework/map-filter.js
index c8e8a88c1..861f10447 100644
--- a/Week2/homework/map-filter.js
+++ b/Week2/homework/map-filter.js
@@ -1,13 +1,20 @@
 'use strict';
-
-function doubleOddNumbers(numbers) {
-  // Replace this comment and the next line with your code
-  console.log(numbers);
+//1.1 Rewrite the above doubleOddNumbers function using map and filter; don't forget to use =>.
+function doubleOddNumbers(myNumbers) {
+  let oddNumbers = [];
+  for (let i = 0; i < myNumbers.length; i++) {
+    if (myNumbers[i] % 2 !== 0) {
+      oddNumbers.push(myNumbers[i] * 2);
+    }
+  }
+  return oddNumbers;
 }
-
 const myNumbers = [1, 2, 3, 4];
 console.log(doubleOddNumbers(myNumbers));
 
+//Rewrite the above doubleOddNumbers function using map and filter; don't forget to use =>.
+const myOddNumbers = myNumbers.filter(myNumber => myNumber % 2 !== 0).map(myNumber => myNumber * 2);
+console.log(myOddNumbers);
 // Do not change or remove anything below this line
 module.exports = {
   myNumbers,
diff --git a/Week3/homework/step2-1.js b/Week3/homework/step2-1.js
index d5699882c..28fa47a4b 100644
--- a/Week3/homework/step2-1.js
+++ b/Week3/homework/step2-1.js
@@ -1,9 +1,7 @@
 'use strict';
 
 function foo(func) {
-  // What to do here?
-  // Replace this comment and the next line with your code
-  console.log(func);
+  func();
 }
 
 function bar() {
diff --git a/Week3/homework/step2-2.js b/Week3/homework/step2-2.js
index dcd135040..f9c57fc8b 100644
--- a/Week3/homework/step2-2.js
+++ b/Week3/homework/step2-2.js
@@ -2,19 +2,25 @@
 
 function threeFive(startIndex, stopIndex, threeCallback, fiveCallback) {
   const numbers = [];
+  for (let number = startIndex; number <= stopIndex; number++) {
+    numbers.push(number);
+    if (number % 3 === 0) {
+      sayThree(number);
+    }
+    if (number % 5 === 0) {
+      sayFive(number);
+    }
+  }
 
-  // Replace this comment and the next line with your code
-  console.log(startIndex, stopIndex, threeCallback, fiveCallback, numbers);
+  console.log(numbers);
 }
 
 function sayThree(number) {
-  // Replace this comment and the next line with your code
-  console.log(number);
+  console.log(sayThree);
 }
 
 function sayFive(number) {
-  // Replace this comment and the next line with your code
-  console.log(number);
+  console.log(sayFive);
 }
 
 threeFive(10, 15, sayThree, sayFive);
diff --git a/Week3/homework/step2-3.js b/Week3/homework/step2-3.js
index 00845c5eb..0b5b39b6c 100644
--- a/Week3/homework/step2-3.js
+++ b/Week3/homework/step2-3.js
@@ -4,13 +4,14 @@
 function repeatStringNumTimesWithFor(str, num) {
   // eslint-disable-next-line prefer-const
   let result = '';
-
-  // Replace this comment and the next line with your code
-  console.log(str, num, result);
-
+  for (let i = 0; i < num; i++) {
+    result += str;
+    if (i === num) {
+      return result;
+    }
+  }
   return result;
 }
-
 console.log('for', repeatStringNumTimesWithFor('abc', 3));
 
 // Use a 'while' loop
@@ -18,8 +19,10 @@ function repeatStringNumTimesWithWhile(str, num) {
   // eslint-disable-next-line prefer-const
   let result = '';
 
-  // Replace this comment and the next line with your code
-  console.log(str, num, result);
+  while (num > 0) {
+    result += str;
+    num--;
+  }
 
   return result;
 }
@@ -31,8 +34,10 @@ function repeatStringNumTimesWithDoWhile(str, num) {
   // eslint-disable-next-line prefer-const
   let result = '';
 
-  // Replace this comment and the next line with your code
-  console.log(str, num, result);
+  do {
+    result += str;
+    num--;
+  } while (num > 0);
 
   return result;
 }
diff --git a/Week3/homework/step2-4.js b/Week3/homework/step2-4.js
index b11b1dcb6..2dab07e87 100644
--- a/Week3/homework/step2-4.js
+++ b/Week3/homework/step2-4.js
@@ -1,10 +1,15 @@
 'use strict';
 
 function Dog() {
-  // add your code here
+  this.name = 'Carry';
+  this.color = 'black';
+  this.numLegs = 4;
 }
 
 const hound = new Dog();
+hound.name = 'Isabella';
+hound.color = 'Gray';
+hound.numLegs = 4;
 
 // Do not change or remove anything below this line
 module.exports = hound;
diff --git a/Week3/homework/step2-5.js b/Week3/homework/step2-5.js
index cbb54fa1d..ff7d18590 100644
--- a/Week3/homework/step2-5.js
+++ b/Week3/homework/step2-5.js
@@ -3,9 +3,11 @@
 function multiplyAll(arr) {
   // eslint-disable-next-line
   let product = 1;
-
-  // Replace this comment and the next line with your code
-  console.log(arr, product);
+  for (let i = 0; i < arr.length; i++) {
+    for (let j = 0; j < arr[i].length; j++) {
+      product *= arr[i][j];
+    }
+  }
 
   return product;
 }
diff --git a/Week3/homework/step2-6.js b/Week3/homework/step2-6.js
index ffe95b9f7..dd7e501dd 100644
--- a/Week3/homework/step2-6.js
+++ b/Week3/homework/step2-6.js
@@ -3,14 +3,27 @@
 const arr2d = [[1, 2], [3, 4], [5, 6]];
 const arr3d = [[[1, 2], [3, 4]], [[5, 6], [7, 8]]];
 
+let my2dArr = [];
+
 function flattenArray2d(arr) {
-  // Replace this comment and the next line with your code
-  console.log(arr);
+  for (let i = 0; i < arr2d.length; i++) {
+    for (let j = 0; j < arr2d[i].length; j++) {
+      my2dArr.push(arr2d[i][j]);
+    }
+  }
+  return my2dArr;
 }
 
+let my3dArr = [];
 function flattenArray3d(arr) {
-  // Replace this comment and the next line with your code
-  console.log(arr);
+  for (let i = 0; i < arr3d.length; i++) {
+    for (let j = 0; j < arr3d[i].length; j++) {
+      for (let k = 0; k < arr3d[j].length; k++) {
+        my3dArr.push(arr3d[i][j][k]);
+      }
+    }
+  }
+  return my3dArr;
 }
 
 console.log(flattenArray2d(arr2d)); // -> [1, 2, 3, 4, 5, 6]
diff --git a/Week3/homework/step2-7.js b/Week3/homework/step2-7.js
index 3e72e8551..357e6cc64 100644
--- a/Week3/homework/step2-7.js
+++ b/Week3/homework/step2-7.js
@@ -21,3 +21,9 @@ f2(y);
 console.log(y);
 
 // Add your explanation as a comment here
+
+/* In the first function:
+- The variable x is assign to 9, the function increment 9 to 10. But since x is a const variable when console.log calls for x, the function prints out the const variable value which is 9.
+ In the second function: 
+- variable y is an object, the function use the key x to change the value of 9. It increment it to 10 and assign it to x. when the console.log calls for y, variable y finds the x and the value 10 which is assigned to it. */
+
diff --git a/Week3/homework/step3-bonus.js b/Week3/homework/step3-bonus.js
index 917091d61..1ebeaddb7 100644
--- a/Week3/homework/step3-bonus.js
+++ b/Week3/homework/step3-bonus.js
@@ -3,10 +3,16 @@
 const values = ['a', 'b', 'c', 'd', 'a', 'e', 'f', 'c'];
 
 function makeUnique(arr) {
-  // Replace this comment and the next line with your code
-  console.log(arr);
+const myUniqueArray = [];
+  arr.forEach(function(element) {
+    if (myUniqueArray.indexOf(element) === -1) {
+      myUniqueArray.push(element);
+    }
+  });
+  return myUniqueArray;
 }
 
+
 const uniqueValues = makeUnique(values);
 console.log(uniqueValues);
 
diff --git a/Week3/homework/step3.js b/Week3/homework/step3.js
index 292724bf4..29c1c2c2a 100644
--- a/Week3/homework/step3.js
+++ b/Week3/homework/step3.js
@@ -1,8 +1,7 @@
 'use strict';
 
 function createBase(base) {
-  // Replace this comment and the next line with your code
-  console.log(base);
+    return base + 6;
 }
 
 const addSix = createBase(6);