diff --git a/1-exercises/A-accessing-values/exercise1.js b/1-exercises/A-accessing-values/exercise1.js
index 67416c69..dcf5a5ce 100644
--- a/1-exercises/A-accessing-values/exercise1.js
+++ b/1-exercises/A-accessing-values/exercise1.js
@@ -8,7 +8,7 @@ let dog = {
   breed: "Dalmatian",
   name: "Spot",
   isHungry: true,
-  happiness: 6
+  happiness: 6,
 };
 
 /*
@@ -16,8 +16,8 @@ let dog = {
   Log the name and breed of this dog using dot notation.
 */
 
-let dogName; // complete the code
-let dogBreed; // complete the code
+let dogName = dog.name; // complete the code
+let dogBreed = dog.breed; // complete the code
 
 console.log(`${dogName} is a ${dogBreed}`);
 
@@ -25,4 +25,4 @@ console.log(`${dogName} is a ${dogBreed}`);
 
   Spot is a Dalmatian
 
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/A-accessing-values/exercise2.js b/1-exercises/A-accessing-values/exercise2.js
index 5b523ace..02189d2b 100644
--- a/1-exercises/A-accessing-values/exercise2.js
+++ b/1-exercises/A-accessing-values/exercise2.js
@@ -7,7 +7,7 @@
 let capitalCities = {
   UnitedKingdom: "London",
   China: "Beijing",
-  Peru: "Lima"
+  Peru: "Lima",
 };
 
 /*
@@ -17,7 +17,7 @@ let capitalCities = {
 */
 
 let myCountry = "UnitedKingdom";
-let myCapitalCity; // complete the code
+let myCapitalCity = capitalCities[myCountry]; // complete the code
 
 console.log(myCapitalCity);
 
@@ -25,4 +25,4 @@ console.log(myCapitalCity);
 
   London
 
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/A-accessing-values/exercise3.js b/1-exercises/A-accessing-values/exercise3.js
index 2e160dd5..ca3e19d7 100644
--- a/1-exercises/A-accessing-values/exercise3.js
+++ b/1-exercises/A-accessing-values/exercise3.js
@@ -21,7 +21,9 @@ let basketballTeam = {
 */
 
 // write code here
-
+for (let player of basketballTeam.topPlayers.sort()) {
+  console.log(player);
+}
 
 /* EXPECTED RESULT
 
@@ -29,4 +31,4 @@ let basketballTeam = {
   Michael Jordan
   Scottie Pippen
 
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/B-setting-values/exercise1.js b/1-exercises/B-setting-values/exercise1.js
index 7d0b05c5..4fbb65f1 100644
--- a/1-exercises/B-setting-values/exercise1.js
+++ b/1-exercises/B-setting-values/exercise1.js
@@ -10,7 +10,7 @@ let capitalCities = {
   },
   China: {
     name: "Beijing",
-  }
+  },
 };
 
 /*
@@ -24,6 +24,13 @@ let capitalCities = {
 
 // write code here
 
+capitalCities.UnitedKingdom.population = 8980000;
+capitalCities.China.population = 21500000;
+capitalCities.Peru = {
+  name: "Lima",
+  population: 9750000,
+};
+
 console.log(capitalCities);
 
 /* EXPECTED RESULT
@@ -34,4 +41,4 @@ console.log(capitalCities);
     Peru: { name: "Lima", population: 9750000 }
   }
 
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/B-setting-values/exercise2.js b/1-exercises/B-setting-values/exercise2.js
index 59fb7c1e..0a7d5273 100644
--- a/1-exercises/B-setting-values/exercise2.js
+++ b/1-exercises/B-setting-values/exercise2.js
@@ -6,7 +6,7 @@
 let student = {
   name: "Reshma Saujani",
   examScore: 65,
-  hasPassed: false
+  hasPassed: false,
 };
 
 /*
@@ -17,6 +17,8 @@ let student = {
 
 // write code here
 
+student["attendance"] = 90;
+
 /*
   - Write an "if" statement that changes the value of hasPassed to true
       if the student has attendance that is equal or greater than 90
@@ -26,6 +28,9 @@ let student = {
 */
 
 // write code here
+if (student.attendance >= 90 && student.examScore > 60) {
+  student.hasPassed = true;
+}
 
 console.log(student);
 
@@ -38,4 +43,4 @@ console.log(student);
     attendance: 90
   }
 
-*/
\ No newline at end of file
+*/
diff --git a/1-exercises/C-undefined-properties/exercise.js b/1-exercises/C-undefined-properties/exercise.js
index 8b00f6ce..6d56dd9e 100644
--- a/1-exercises/C-undefined-properties/exercise.js
+++ b/1-exercises/C-undefined-properties/exercise.js
@@ -15,6 +15,7 @@ let car = {
 };
 
 console.log(car["colour"]);
+// there is no property called 'colour' in the car object
 
 // Example 2
 function sayHelloToUser(user) {
@@ -22,17 +23,19 @@ function sayHelloToUser(user) {
 }
 
 let user = {
-  name: "Mira"
+  name: "Mira",
 };
 
 sayHelloToUser(user);
+// there is no property called 'firstName' in the user object
 
 // Example 3
 let myPet = {
   animal: "Cat",
-  getName: function() {
+  getName: function () {
     "My pet's name is Fluffy";
   },
 };
 
 console.log(myPet.getName());
+// nothing is being returned in the method definition of the 'getName' method
diff --git a/1-exercises/D-object-methods/exercise.js b/1-exercises/D-object-methods/exercise.js
index 0b57f2e1..fa03d48e 100644
--- a/1-exercises/D-object-methods/exercise.js
+++ b/1-exercises/D-object-methods/exercise.js
@@ -9,7 +9,10 @@
 
 let student = {
   // write code here
-}
+  getName: function (name) {
+    console.log(`Student name: ${name}`);
+  },
+};
 
 student.getName("Daniel");
 
@@ -17,4 +20,4 @@ student.getName("Daniel");
 
   Student name: Daniel
 
-*/
\ No newline at end of file
+*/
diff --git a/2-mandatory/1-recipes.js b/2-mandatory/1-recipes.js
index 6243fa9c..edc3f871 100644
--- a/2-mandatory/1-recipes.js
+++ b/2-mandatory/1-recipes.js
@@ -22,4 +22,63 @@
   You should write and log at least 5 recipes
 */
 
-// write code here
\ No newline at end of file
+// write code here
+const recipe1 = {
+  title: "Fried Egg",
+  servings: 1,
+  ingredients: ["Egg", "Oil"],
+};
+
+console.log(recipe1.title);
+console.log(`Serves: ${recipe1.servings}`);
+console.log(`Ingredients:
+${recipe1.ingredients[0]}
+${recipe1.ingredients[1]}`);
+
+const recipe2 = {
+  title: "Spinach Rice",
+  servings: 2,
+  ingredients: ["Spinach", "Rice"],
+};
+
+console.log(recipe2.title);
+console.log(`Serves: ${recipe2.servings}`);
+console.log(`Ingredients:
+${recipe2.ingredients[0]}
+${recipe2.ingredients[1]}`);
+
+const recipe3 = {
+  title: "Behari Kebab",
+  servings: 4,
+  ingredients: ["Kebab", "Masala"],
+};
+
+console.log(recipe3.title);
+console.log(`Serves: ${recipe3.servings}`);
+console.log(`Ingredients:
+${recipe3.ingredients[0]}
+${recipe3.ingredients[1]}`);
+
+const recipe4 = {
+  title: "Fried Fish",
+  servings: 1,
+  ingredients: ["Fish", "Oil"],
+};
+
+console.log(recipe4.title);
+console.log(`Serves: ${recipe4.servings}`);
+console.log(`Ingredients:
+${recipe4.ingredients[0]}
+${recipe4.ingredients[1]}`);
+
+const recipe5 = {
+  title: "Icecream Milkshake",
+  servings: 1,
+  ingredients: ["Icecream", "Milk"],
+};
+
+console.log(recipe5.title);
+console.log(`Serves: ${recipe5.servings}`);
+console.log(`Ingredients:
+${recipe5.ingredients[0]}
+${recipe5.ingredients[1]}`);
diff --git a/2-mandatory/2-currency-code-lookup.js b/2-mandatory/2-currency-code-lookup.js
index 5fde14f1..ad452a9c 100644
--- a/2-mandatory/2-currency-code-lookup.js
+++ b/2-mandatory/2-currency-code-lookup.js
@@ -18,9 +18,17 @@ const COUNTRY_CURRENCY_CODES = [
 ];
 
 function createLookup(countryCurrencyCodes) {
-  // write code here
+  const obj = {};
+
+  for (let pair of countryCurrencyCodes) {
+    obj[pair[0]] = pair[1];
+  }
+
+  return obj;
 }
 
+console.log(createLookup(COUNTRY_CURRENCY_CODES));
+
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 2-currency-code-lookup.js`
 - To run all exercises/tests in the mandatory folder, run `npm test`
@@ -34,4 +42,4 @@ test("creates country currency code lookup", () => {
     NG: "NGN",
     MX: "MXN",
   });
-});
\ No newline at end of file
+});
diff --git a/2-mandatory/3-shopping-list.js b/2-mandatory/3-shopping-list.js
index d25cb366..36d6a55d 100644
--- a/2-mandatory/3-shopping-list.js
+++ b/2-mandatory/3-shopping-list.js
@@ -19,7 +19,21 @@ let pantry = {
 };
 
 function createShoppingList(recipe) {
-  // write code here
+  const newIngredientsList = [];
+
+  for (let ingredient of recipe.ingredients) {
+    if (
+      !pantry.fridgeContents.includes(ingredient) &&
+      !pantry.cupboardContents.includes(ingredient)
+    ) {
+      newIngredientsList.push(ingredient);
+    }
+  }
+
+  delete recipe.ingredients;
+  recipe.items = newIngredientsList;
+
+  return recipe;
 }
 
 /* ======= TESTS - DO NOT MODIFY =====
@@ -43,11 +57,18 @@ test("createShoppingList works for pancakes recipe", () => {
 test("createShoppingList works for margherita pizza recipe", () => {
   let recipe2 = {
     name: "margherita pizza",
-    ingredients: ["flour", "salt", "yeast", "tinned tomatoes", "oregano", "mozarella"],
+    ingredients: [
+      "flour",
+      "salt",
+      "yeast",
+      "tinned tomatoes",
+      "oregano",
+      "mozarella",
+    ],
   };
 
   expect(createShoppingList(recipe2)).toEqual({
     name: "margherita pizza",
-    items: ["flour", "yeast", "mozarella"]
+    items: ["flour", "yeast", "mozarella"],
   });
-});
\ No newline at end of file
+});
diff --git a/2-mandatory/4-restaurant.js b/2-mandatory/4-restaurant.js
index d7b81eea..3c308279 100644
--- a/2-mandatory/4-restaurant.js
+++ b/2-mandatory/4-restaurant.js
@@ -20,8 +20,16 @@ const MENU = {
 };
 
 let cashRegister = {
-  // write code here
-}
+  orderBurger(balance) {
+    return balance >= MENU.burger ? balance - MENU.burger : balance;
+  },
+  orderFalafel(balance) {
+    return balance >= MENU.falafel ? balance - MENU.falafel : balance;
+  },
+};
+
+console.log(cashRegister.orderBurger(6.5));
+console.log(cashRegister.orderBurger(6.49));
 
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 4-restaurant.js`
diff --git a/3-extra/1-count-words.js b/3-extra/1-count-words.js
index 9d347ae5..64aba6ea 100644
--- a/3-extra/1-count-words.js
+++ b/3-extra/1-count-words.js
@@ -27,10 +27,29 @@ function countWords(string) {
   const wordCount = {};
 
   // write code here
+  if (!string) {
+    return wordCount;
+  } else {
+    const split = string.split(" ");
+
+    for (let word of split) {
+      wordCount[word] = count(word, split);
+    }
+  }
 
   return wordCount;
 }
 
+function count(word, splitString) {
+  let count = 0;
+
+  for (let word2 of splitString) {
+    if (word === word2) count++;
+  }
+
+  return count;
+}
+
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm run extra-tests`
 - To run all exercises/tests in the mandatory folder, run `npm test`
@@ -46,9 +65,13 @@ test("Code works for a small string", () => {
 });
 
 test("A string with, some punctuation", () => {
-  expect(countWords("A string with, some punctuation")).toEqual(
-    { A: 1, string: 1, "with,": 1, some: 1, punctuation: 1 }
-  );
+  expect(countWords("A string with, some punctuation")).toEqual({
+    A: 1,
+    string: 1,
+    "with,": 1,
+    some: 1,
+    punctuation: 1,
+  });
 });
 
 test("Empty string", () => {
@@ -56,7 +79,11 @@ test("Empty string", () => {
 });
 
 test("Example task string", () => {
-  expect(countWords("you're braver than you believe, stronger than you seem, and smarter than you think")).toEqual({
+  expect(
+    countWords(
+      "you're braver than you believe, stronger than you seem, and smarter than you think"
+    )
+  ).toEqual({
     "you're": 1,
     and: 1,
     "believe,": 1,