diff --git a/1-exercises/A-accessing-values/exercise1.js b/1-exercises/A-accessing-values/exercise1.js
index 67416c69..79029801 100644
--- a/1-exercises/A-accessing-values/exercise1.js
+++ b/1-exercises/A-accessing-values/exercise1.js
@@ -16,11 +16,13 @@ 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;
+let dogBreed=dog.breed; 
 
 console.log(`${dogName} is a ${dogBreed}`);
 
+
+
 /* EXPECTED RESULT
 
   Spot is a Dalmatian
diff --git a/1-exercises/A-accessing-values/exercise2.js b/1-exercises/A-accessing-values/exercise2.js
index 5b523ace..860288b7 100644
--- a/1-exercises/A-accessing-values/exercise2.js
+++ b/1-exercises/A-accessing-values/exercise2.js
@@ -17,7 +17,7 @@ let capitalCities = {
 */
 
 let myCountry = "UnitedKingdom";
-let myCapitalCity; // complete the code
+let myCapitalCity=['London']; 
 
 console.log(myCapitalCity);
 
diff --git a/1-exercises/A-accessing-values/exercise3.js b/1-exercises/A-accessing-values/exercise3.js
index 2e160dd5..97fa85a9 100644
--- a/1-exercises/A-accessing-values/exercise3.js
+++ b/1-exercises/A-accessing-values/exercise3.js
@@ -12,7 +12,8 @@ let basketballTeam = {
     address: "1901 W Madison St",
   },
 };
-
+let sortTeam = basketballTeam.topPlayers.sort();
+sortTeam.forEach(player =>console.log(player));
 /*
   Write code that
     - accesses the basketball team's top players array
@@ -20,7 +21,6 @@ let basketballTeam = {
     - console.logs the name of each player on a new line
 */
 
-// write code here
 
 
 /* EXPECTED RESULT
diff --git a/1-exercises/B-setting-values/exercise1.js b/1-exercises/B-setting-values/exercise1.js
index 7d0b05c5..5499d85a 100644
--- a/1-exercises/B-setting-values/exercise1.js
+++ b/1-exercises/B-setting-values/exercise1.js
@@ -7,9 +7,14 @@ let capitalCities = {
   UnitedKingdom: {
     name: "London",
     population: 20,
+    
   },
   China: {
     name: "Beijing",
+  },
+
+  Peru:{
+    
   }
 };
 
@@ -22,7 +27,14 @@ let capitalCities = {
     - Add a population of 9750000 to Peru's capital city.
 */
 
-// write code here
+ capitalCities.UnitedKingdom.population= 8980000
+ capitalCities.China.population=2150000
+
+ capitalCities.Peru= {
+name : "Lima",
+population : 9750000
+ }
+
 
 console.log(capitalCities);
 
diff --git a/1-exercises/B-setting-values/exercise2.js b/1-exercises/B-setting-values/exercise2.js
index 59fb7c1e..9ca83ef2 100644
--- a/1-exercises/B-setting-values/exercise2.js
+++ b/1-exercises/B-setting-values/exercise2.js
@@ -6,7 +6,8 @@
 let student = {
   name: "Reshma Saujani",
   examScore: 65,
-  hasPassed: false
+  hasPassed: false,
+  
 };
 
 /*
@@ -15,7 +16,7 @@ let student = {
     - Set the value of attendance to 90
 */
 
-// write code here
+student['attendance']=90;
 
 /*
   - Write an "if" statement that changes the value of hasPassed to true
@@ -25,8 +26,9 @@ let student = {
   - Use bracket notation to change the value of hasPassed
 */
 
-// write code here
-
+if(student.attendance >= 90 && student.examScore> 60 ){
+  student['hasPassed']=true
+}
 console.log(student);
 
 /* EXPECTED RESULT
diff --git a/1-exercises/C-undefined-properties/exercise.js b/1-exercises/C-undefined-properties/exercise.js
index 8b00f6ce..2c7db8c0 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"]);
+//as we did not diclre color for the car//
 
 // Example 2
 function sayHelloToUser(user) {
@@ -27,6 +28,8 @@ let user = {
 
 sayHelloToUser(user);
 
+// as we have 'name' in our object and gave that value but we called 'firstName' in line 22 and they are not match
+
 // Example 3
 let myPet = {
   animal: "Cat",
@@ -36,3 +39,4 @@ let myPet = {
 };
 
 console.log(myPet.getName());
+// there is not return statement in our function//
\ No newline at end of file
diff --git a/1-exercises/D-object-methods/exercise.js b/1-exercises/D-object-methods/exercise.js
index 0b57f2e1..0c0fe478 100644
--- a/1-exercises/D-object-methods/exercise.js
+++ b/1-exercises/D-object-methods/exercise.js
@@ -8,8 +8,11 @@
 */
 
 let student = {
-  // write code here
-}
+ getName:function(name){
+  console.log(`Student name : ${name}`);
+ },
+
+};
 
 student.getName("Daniel");
 
diff --git a/2-mandatory/1-recipes.js b/2-mandatory/1-recipes.js
index 6243fa9c..be49f8ff 100644
--- a/2-mandatory/1-recipes.js
+++ b/2-mandatory/1-recipes.js
@@ -21,5 +21,17 @@
 
   You should write and log at least 5 recipes
 */
+let favoriteRecipe ={
+  title : 'Mole',
+  servings : 2 ,
+  ingredients :['cinnamon' , 'cumin' , 'cocoa' ]
+};
+
+console.log(favoriteRecipe.title);
+console.log(`Serves: ${favoriteRecipe.servings}`);
+console.log('Ingredients:')
+favoriteRecipe.ingredients.forEach((item) => {
+  console.log(item);
+});
 
 // write code here
\ No newline at end of file
diff --git a/2-mandatory/2-currency-code-lookup.js b/2-mandatory/2-currency-code-lookup.js
index 5fde14f1..ff19a814 100644
--- a/2-mandatory/2-currency-code-lookup.js
+++ b/2-mandatory/2-currency-code-lookup.js
@@ -18,7 +18,14 @@ const COUNTRY_CURRENCY_CODES = [
 ];
 
 function createLookup(countryCurrencyCodes) {
-  // write code here
+  let currencyCodeLook ={};
+
+for (let countryCurrencyCode of countryCurrencyCodes){
+  let countryCode = countryCurrencyCode[0];
+  let countryCurrency = countryCurrencyCode[1];
+currencyCodeLook[countryCode]=countryCurrency;
+};
+return currencyCodeLook;
 }
 
 /* ======= TESTS - DO NOT MODIFY =====
diff --git a/2-mandatory/3-shopping-list.js b/2-mandatory/3-shopping-list.js
index d25cb366..9e55c8df 100644
--- a/2-mandatory/3-shopping-list.js
+++ b/2-mandatory/3-shopping-list.js
@@ -10,7 +10,7 @@
 
   The createShoppingList function should return an object with two properties:
     - "name" of the recipe, which is a string,
-    - "items", which is an arry of the missing ingredients that need to be on the shopping list
+    - "items", which is an array of the missing ingredients that need to be on the shopping list
 */
 
 let pantry = {
@@ -19,9 +19,18 @@ let pantry = {
 };
 
 function createShoppingList(recipe) {
-  // write code here
-}
+  let shoppingList = recipe.ingredients.filter(
+    (ingredient) => {
+      return !pantry.fridgeContents.includes(ingredient) && !pantry.cupboardContents.includes(ingredient)
+
+    }
+  );
+  return {
+    name : recipe.name,
+    items : shoppingList,
+  }
 
+}
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 3-shopping-list.js`
 - To run all exercises/tests in the mandatory folder, run `npm test`
diff --git a/2-mandatory/4-restaurant.js b/2-mandatory/4-restaurant.js
index d7b81eea..75809016 100644
--- a/2-mandatory/4-restaurant.js
+++ b/2-mandatory/4-restaurant.js
@@ -21,7 +21,23 @@ const MENU = {
 
 let cashRegister = {
   // write code here
-}
+  orderBurger : function (balance){
+    let lastBalance = balance;
+    let balanceEnough = balance - MENU.burger >= 0;
+    if (balanceEnough){
+      lastBalance = balance - MENU.burger;
+    }
+    return lastBalance;
+  },
+ orderFalafel : function (balance){
+    let lastBalance = balance;
+    let balanceEnough = balance - MENU.falafel >= 0;
+    if (balanceEnough){
+      lastBalance = balance - MENU.falafel;
+    }
+    return lastBalance;
+  }, 
+};
 
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 4-restaurant.js`
diff --git a/2-mandatory/5-writing-tests.js b/2-mandatory/5-writing-tests.js
index 1443608b..3531659d 100644
--- a/2-mandatory/5-writing-tests.js
+++ b/2-mandatory/5-writing-tests.js
@@ -35,7 +35,7 @@ function convertScoreToGrade(score) {
   passes.
 */
 test("a score of 83 is grade A", () => {
-  expect(convertScoreToGrade(83), "Z");
+  expect(convertScoreToGrade(83)).toBe ("A");
 });
 
 /*
@@ -43,33 +43,48 @@ test("a score of 83 is grade A", () => {
   write a matching test
 */
 
-test.skip("a score of 71 is grade B", () => {
-  /* Remove the .skip above, then write the test body. */
-});
+test("a score of 71 is grade B", () => {
+  expect(convertScoreToGrade(71)).toBe ("B");
+})
 /*
   Write a test that checks a score of 68 is grade C
 */
-
+test ("a score of 68 is grade C" ,() => {
+  expect(convertScoreToGrade(68)).toBe("C");
+});
 /*
   Write a test that checks a score of 55 is grade D
 */
-
+test ("a score of 55 is grade D" ,() => {
+  expect(convertScoreToGrade(55)).toBe("D");
+});
 /*
   Write a test that checks a score of 68 is grade C
 */
-
+test ("a score of 68 is grade C" ,() => {
+  expect(convertScoreToGrade(68)).toBe("C");
+});
 /*
   Write a test that checks a score of 55 is grade D
 */
-
+test ("a score of 55 is grade D" ,() => {
+  expect(convertScoreToGrade(55)).toBe("D");
+});
 /*
   Write a test that checks a score of 49 is grade E
 */
-
+test ("a score of 49 is grade E" ,() => {
+  expect(convertScoreToGrade(49)).toBe("E");
+});
 /*
   Write a test that checks a score of 30 is grade E
 */
-
+test ("a score of 30 is grade E" ,() => {
+  expect(convertScoreToGrade(30)).toBe("E");
+});
 /*
   Write a test that checks a score of 70 is grade B
 */
+test ("a score of 70 is grade B" ,() => {
+  expect(convertScoreToGrade(70)).toBe("B");
+});
\ No newline at end of file
diff --git a/2-mandatory/6-writing-tests-advanced.js b/2-mandatory/6-writing-tests-advanced.js
index 8d227e27..bb9c6d39 100644
--- a/2-mandatory/6-writing-tests-advanced.js
+++ b/2-mandatory/6-writing-tests-advanced.js
@@ -10,7 +10,7 @@
   trainee has completed.
 */
 
-function convertScoreToGrade() {
+function convertScoreToGrade(score) {
   let grade = null;
 
   if (score >= 80) {
@@ -55,7 +55,12 @@ function formatCourseworkResult(trainee) {
     score: 63
   }
 */
-
+test ("a score of 63 is grade C" ,() => {
+const trainee = { name : 'Xin' , score :63};
+expect(formatCourseworkResult (trainee)).toEqual(
+  "Xin's coursework was marked as grade C."  
+);
+});
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
   {
@@ -63,7 +68,12 @@ function formatCourseworkResult(trainee) {
     score: 78
   }
 */
-
+test ('a score of 78 is grade B' , () => {
+  const trainee = { name: 'Mona' , score : 78} ;
+  expect (formatCourseworkResult (trainee)).toEqual(
+    "Mona's coursework was marked as grade B."
+  );
+});
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
   {
@@ -73,7 +83,17 @@ function formatCourseworkResult(trainee) {
     subjects: ["JavaScript", "React", "CSS"]
   }
 */
-
+test('a score of 49 is grade E', () =>{
+  const trainee ={
+    name :'Ali',
+    score : 49 ,
+    age : 33,
+    subjects : ['JavaScript' , 'React' , 'CSS'],
+  };
+  expect(formatCourseworkResult(trainee)).toEqual(
+    "Ali's coursework was marked as grade E."
+  );
+});
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
   {
@@ -81,7 +101,10 @@ function formatCourseworkResult(trainee) {
     age: 29
   }
 */
-
+test ('object without name property will face error' , () =>{
+  const trainee ={score:90 , age:29};
+  expect(formatCourseworkResult(trainee)).toEqual('Error: No trainee name!');
+});
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
   {
@@ -89,3 +112,9 @@ function formatCourseworkResult(trainee) {
     subjects: ["HTML", "CSS", "Databases"]
   }
 */
+test('object without score property will face error' ,() => {
+  const trainee ={ name :'Amen' , subjects :['HTML' , ' CSS', 'Databases']};
+  expect(formatCourseworkResult(trainee)).toEqual(
+    'Error: Coursework percent is not a number!'
+  );
+});