diff --git a/week-1/Homework/mandatory/0-thinking-like-a-programmer/task.md b/week-1/Homework/mandatory/0-thinking-like-a-programmer/task.md
index d2b9f40..b72bc44 100644
--- a/week-1/Homework/mandatory/0-thinking-like-a-programmer/task.md
+++ b/week-1/Homework/mandatory/0-thinking-like-a-programmer/task.md
@@ -31,10 +31,19 @@ After you've watched these videos I'd like you to answer these questions
 
 <!-- Write your answer here -->
 
+To be a problem solver. To be able to think about a problem and come up with a solution.
+
 ## 2. When trying to solve a challenge, what should you do first?
 
 <!-- Write your answer here -->
 
+1. Try and understand your problem.
+2. Try and visualise it and maybe do the rubber duckie thing.
+
 ## 3. What should you do if you get stuck?
 
 <!-- Write your answer here -->
+
+You stop and take a break and the regroup.
+Talk to a rubber duckie
+Research google
diff --git a/week-1/Homework/mandatory/1-debugging-practice/script.js b/week-1/Homework/mandatory/1-debugging-practice/script.js
index dc14a77..9a299ff 100644
--- a/week-1/Homework/mandatory/1-debugging-practice/script.js
+++ b/week-1/Homework/mandatory/1-debugging-practice/script.js
@@ -37,8 +37,8 @@ function submit() {
     alert("Please fill all fields!");
     return false;
   } else {
-    let book = new Book(title.value, title.value, pages.value, check.checked);
-    library.push(book);
+    let book = new Book(title.value, author.value, pages.value, check.checked);
+    myLibrary.push(book);
     render();
   }
 }
@@ -54,7 +54,7 @@ function render() {
   let table = document.getElementById("display");
   let rowsNumber = table.rows.length;
   //delete old table
-  for (let n = rowsNumber - 1; n > 0; n-- {
+  for (let n = rowsNumber - 1; n > 0; n--) {
     table.deleteRow(n);
   }
   //insert updated row and cells
@@ -76,7 +76,7 @@ function render() {
     changeBut.className = "btn btn-success";
     cell4.appendChild(changeBut);
     let readStatus = "";
-    if (myLibrary[i].check == false) {
+    if (myLibrary[i].check === true) {
       readStatus = "Yes";
     } else {
       readStatus = "No";
@@ -84,17 +84,17 @@ function render() {
     changeBut.innerHTML = readStatus;
 
     changeBut.addEventListener("click", function () {
-      myLibrary[i].check = !myLibrary[i].check;
+      myLibrary[i].check ===!myLibrary[i].check;
       render();
     });
 
     //add delete button to every row and render again
     let delButton = document.createElement("button");
-    delBut.id = i + 5;
-    cell5.appendChild(delBut);
-    delBut.className = "btn btn-warning";
-    delBut.innerHTML = "Delete";
-    delBut.addEventListener("clicks", function () {
+    delButton.id = i + 5;
+    cell5.appendChild(delButton);
+    delButton.className = "btn btn-warning";
+    delButton.innerHTML = "Delete";
+    delButton.addEventListener("click", function () {
       alert(`You've deleted title: ${myLibrary[i].title}`);
       myLibrary.splice(i, 1);
       render();
diff --git a/week-3/Homework/mandatory/2-exercises/1-shopping-cart.js b/week-3/Homework/mandatory/2-exercises/1-shopping-cart.js
new file mode 100644
index 0000000..d978f1b
--- /dev/null
+++ b/week-3/Homework/mandatory/2-exercises/1-shopping-cart.js
@@ -0,0 +1,27 @@
+/*
+
+Complete the rest of this code to create an online shopping cart.
+
+The output of running your code should be:
+
+    Your shopping cart has 3 items: Toilet Roll, Pasta, Eggs
+
+    
+*/
+
+class ShoppingCart {
+  // Add your code here
+
+  cartContains() {
+    console.log()
+    // Use console.log() to output everything contained in your cart
+  }
+}
+
+let myCart = new ShoppingCart(); // Creates an empty shopping cart
+
+myCart.addItem("Toilet Roll");
+myCart.addItem("Pasta");
+myCart.addItem("Eggs");
+
+myCart.cartContains();
diff --git a/week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.js b/week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.js
index 10b93ba..1e1dbbe 100644
--- a/week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.js
+++ b/week-3/Homework/mandatory/2-exercises/exercise-1/exercise-1.js
@@ -1,11 +1,15 @@
 const personOne = {
-    name: 'Popeye',
-    age: 34,
-    favouriteFood: 'Spinach'
-}
+  name: "Ebenezer",
+  age: 110,
+  favouriteFood: "Brocolli",
+};
+
+const { name, age, favouriteFood } = personOne;
 
 function introduceYourself(___________________________) {
-    console.log (`Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`); 
+  console.log(
+    `Hello, my name is ${name}. I am ${age} years old and my favourite food is ${favouriteFood}.`
+  );
 }
 
-introduceYourself(personOne);
\ No newline at end of file
+introduceYourself(personOne);
diff --git a/week-3/Homework/mandatory/2-exercises/exercise-2/exercise-2.js b/week-3/Homework/mandatory/2-exercises/exercise-2/exercise-2.js
index 0d3ade0..5a84d3f 100644
--- a/week-3/Homework/mandatory/2-exercises/exercise-2/exercise-2.js
+++ b/week-3/Homework/mandatory/2-exercises/exercise-2/exercise-2.js
@@ -1,11 +1,87 @@
 let hogwarts = [
-    { firstName: "Harry", lastName: "Potter", house: "Gryffindor", pet: "Owl", occupation: "Student" },
-    { firstName: "Hermione", lastName: "Granger", house: "Gryffindor", pet: "Cat", occupation: "Student" },
-    { firstName: "Draco", lastName: "Malfoy", house: "Slytherin", pet: null, occupation: "Student" },
-    { firstName: "Cedric", lastName: "Diggory", house: "HufflePuff", pet: null, occupation: "Student" },
-    { firstName: "Severus", lastName: "Snape", house: "Slytherin", pet: null, occupation: "Teacher" },
-    { firstName: "Filius", lastName: "Flitwick", house: "Ravenclaw", pet: null, occupation: "Teacher" },
-    { firstName: "Pomona", lastName: "Sprout", house: "Hufflepuff", pet: null, occupation: "Teacher" },
-    { firstName: "Minerva", lastName: "McGonagall", house: "Gryffindor", pet: null, occupation: "Teacher" },
-    { firstName: "Albus", lastName: "Dumbledore", house: "Gryffindor", pet: "Phoenix", occupation: "Teacher" }
-]
+  {
+    firstName: "Harry",
+    lastName: "Potter",
+    house: "Gryffindor",
+    pet: "Owl",
+    occupation: "Student",
+  },
+  {
+    firstName: "Hermione",
+    lastName: "Granger",
+    house: "Gryffindor",
+    pet: "Cat",
+    occupation: "Student",
+  },
+  {
+    firstName: "Draco",
+    lastName: "Malfoy",
+    house: "Slytherin",
+    pet: null,
+    occupation: "Student",
+  },
+  {
+    firstName: "Cedric",
+    lastName: "Diggory",
+    house: "HufflePuff",
+    pet: null,
+    occupation: "Student",
+  },
+  {
+    firstName: "Severus",
+    lastName: "Snape",
+    house: "Slytherin",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Filius",
+    lastName: "Flitwick",
+    house: "Ravenclaw",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Pomona",
+    lastName: "Sprout",
+    house: "Hufflepuff",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Minerva",
+    lastName: "McGonagall",
+    house: "Gryffindor",
+    pet: null,
+    occupation: "Teacher",
+  },
+  {
+    firstName: "Albus",
+    lastName: "Dumbledore",
+    house: "Gryffindor",
+    pet: "Phoenix",
+    occupation: "Teacher",
+  },
+];
+
+function peopleGryffindor(arr) {
+  for (var i = 0; i < arr.length; ++i) {
+    let { firstName, lastName, house } = arr[i];
+    if (house === "Gryffindor") {
+      console.log(`${firstName} ${lastName}`);
+    }
+  }
+}
+
+peopleGryffindor(hogwarts);
+
+function petOwners(arr) {
+  for (var i = 0; i < arr.length; ++i) {
+    let { firstName, lastName, pet, occupation } = arr[i];
+    if (pet !== null && occupation === "Teacher") {
+      console.log(`${firstName} ${lastName}`);
+    }
+  }
+}
+
+petOwners(hogwarts);
diff --git a/week-3/Homework/mandatory/2-exercises/exercise-3/exercise-3.js b/week-3/Homework/mandatory/2-exercises/exercise-3/exercise-3.js
index b60d527..855126f 100644
--- a/week-3/Homework/mandatory/2-exercises/exercise-3/exercise-3.js
+++ b/week-3/Homework/mandatory/2-exercises/exercise-3/exercise-3.js
@@ -1,9 +1,25 @@
- let order = [
-     { itemName: "Hot cakes", quantity: 1, unitPrice: 2.29},
-     { itemName: "Apple Pie", quantity: 2, unitPrice: 1.39},
-     { itemName: "Egg McMuffin", quantity: 1, unitPrice: 2.80},
-     { itemName: "Sausage McMuffin", quantity: 1, unitPrice: 3.00},
-     { itemName: "Hot Coffee", quantity: 2, unitPrice: 1.00},
-     { itemName: "Hash Brown", quantity: 4, unitPrice: 0.40}
- ]
- 
\ No newline at end of file
+let order = [
+  { itemName: "Hot cakes", quantity: 1, unitPrice: 2.29 },
+  { itemName: "Apple Pie", quantity: 2, unitPrice: 1.39 },
+  { itemName: "Egg McMuffin", quantity: 1, unitPrice: 2.8 },
+  { itemName: "Sausage McMuffin", quantity: 1, unitPrice: 3.0 },
+  { itemName: "Hot Coffee", quantity: 2, unitPrice: 1.0 },
+  { itemName: "Hash Brown", quantity: 4, unitPrice: 0.4 },
+];
+
+function printReceipt(order) {
+  let totalPx = 0;
+  console.log(`QTY   ITEM   TOTAL`);
+  for (let i = 0; i < order.length; ++i) {
+    const { itemName, quantity, unitPrice } = order[i];
+    totalPx += unitPrice;
+    if (itemName.length > 12) {
+      console.log(`${quantity}  ${itemName}  ${unitPrice.toFixed(2)}`);
+    } else {
+      console.log(`${quantity}  ${itemName}  ${unitPrice.toFixed(2)}`);
+    }
+  }
+  console.log(`Total: ${totalPx.toFixed(2)}`);
+}
+
+printReceipt(order);