diff --git a/1-exercises/A-accessing-values/exercise1.js b/1-exercises/A-accessing-values/exercise1.js
index 67416c69..5624523e 100644
--- a/1-exercises/A-accessing-values/exercise1.js
+++ b/1-exercises/A-accessing-values/exercise1.js
@@ -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;
+let dogBreed = dog.breed;
 
 console.log(`${dogName} is a ${dogBreed}`);
 
diff --git a/1-exercises/A-accessing-values/exercise2.js b/1-exercises/A-accessing-values/exercise2.js
index 5b523ace..b034edc9 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 = capitalCities["UnitedKingdom"];
 
 console.log(myCapitalCity);
 
diff --git a/1-exercises/A-accessing-values/exercise3.js b/1-exercises/A-accessing-values/exercise3.js
index 2e160dd5..f1eb9a9e 100644
--- a/1-exercises/A-accessing-values/exercise3.js
+++ b/1-exercises/A-accessing-values/exercise3.js
@@ -20,7 +20,9 @@ let basketballTeam = {
     - console.logs the name of each player on a new line
 */
 
-// write code here
+let sortedTeam = basketballTeam.topPlayers.sort();
+
+console.log(sortedTeam);
 
 
 /* EXPECTED RESULT
diff --git a/1-exercises/B-setting-values/exercise1.js b/1-exercises/B-setting-values/exercise1.js
index 7d0b05c5..616ffc97 100644
--- a/1-exercises/B-setting-values/exercise1.js
+++ b/1-exercises/B-setting-values/exercise1.js
@@ -22,7 +22,12 @@ let capitalCities = {
     - Add a population of 9750000 to Peru's capital city.
 */
 
-// write code here
+capitalCities.UnitedKingdom["population"] = 8980000;
+capitalCities.China["population"] = 21500000;
+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..eea2aa1e 100644
--- a/1-exercises/B-setting-values/exercise2.js
+++ b/1-exercises/B-setting-values/exercise2.js
@@ -15,7 +15,7 @@ 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
@@ -25,7 +25,9 @@ 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);
 
diff --git a/1-exercises/C-undefined-properties/exercise.js b/1-exercises/C-undefined-properties/exercise.js
index 8b00f6ce..ef7e2284 100644
--- a/1-exercises/C-undefined-properties/exercise.js
+++ b/1-exercises/C-undefined-properties/exercise.js
@@ -13,6 +13,7 @@ let car = {
   brand: "Ford",
   yearsOld: 8,
 };
+// the is no object for colour 
 
 console.log(car["colour"]);
 
@@ -20,6 +21,7 @@ console.log(car["colour"]);
 function sayHelloToUser(user) {
   console.log(`Hello ${user.firstName}`);
 }
+// the object name not related to firstName to console user name and function working.
 
 let user = {
   name: "Mira"
@@ -35,4 +37,6 @@ let myPet = {
   },
 };
 
+// uncompleted function no return or doing any thing 
+
 console.log(myPet.getName());
diff --git a/1-exercises/D-object-methods/exercise.js b/1-exercises/D-object-methods/exercise.js
index 0b57f2e1..bfccc2f1 100644
--- a/1-exercises/D-object-methods/exercise.js
+++ b/1-exercises/D-object-methods/exercise.js
@@ -8,7 +8,9 @@
 */
 
 let student = {
-  // write code here
+   getname: function (name){
+      console.log("Student name: ");
+   }
 }
 
 student.getName("Daniel");
diff --git a/2-mandatory/1-recipes.js b/2-mandatory/1-recipes.js
index 6243fa9c..091fe928 100644
--- a/2-mandatory/1-recipes.js
+++ b/2-mandatory/1-recipes.js
@@ -22,4 +22,26 @@
   You should write and log at least 5 recipes
 */
 
-// write code here
\ No newline at end of file
+let banoffee = {
+  title: "Banoffee",
+  servings: 7,
+  ingredients: [
+    "bananas",
+    "biscuits",
+    "butter",
+    "condensed milk",
+    "sugar",
+    "cream",
+  ],
+};
+console.log(banoffee.title);
+console.log("Serves: " + banoffee.servings);
+console.log("Ingredients:");
+// for (let i = 0; i < banoffee.ingredients.length; i++) {
+//   console.log(banoffee.ingredients[i]);
+// }
+// review solution 
+
+banoffee.ingredients.forEach((el) => {
+  console.log(el);
+});
diff --git a/2-mandatory/2-currency-code-lookup.js b/2-mandatory/2-currency-code-lookup.js
index 5fde14f1..6d64b55b 100644
--- a/2-mandatory/2-currency-code-lookup.js
+++ b/2-mandatory/2-currency-code-lookup.js
@@ -17,10 +17,36 @@ const COUNTRY_CURRENCY_CODES = [
   ["MX", "MXN"],
 ];
 
-function createLookup(countryCurrencyCodes) {
-  // write code here
+function createLookup(countryCurrencyCodes){
+    let resultLookup = {};
+  countryCurrencyCodes.forEach(([el, curr]) => {
+        resultLookup[el] = curr
+  });
+  return resultLookup
 }
 
+
+//------>>> another solution
+
+// function createLookup(countryCurrencyCodes) {
+//   let countryCurrencyCodesLookup = {};
+//   for (let countryCurrencyCode of countryCurrencyCodes) {
+//     countryCurrencyCodesLookup[countryCurrencyCode[0]] =
+//      countryCurrencyCode[1];
+//   }
+//   return countryCurrencyCodesLookup;
+// }
+
+//------>>> another solution
+
+// function createLookup(COUNTRY_CURRENCY_CODES) {
+//   const country = new Map(COUNTRY_CURRENCY_CODES);
+//   const obj = Object.fromEntries(country);
+//   return obj
+// }
+
+
+
 /* ======= 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 +60,4 @@ 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..013d094b 100644
--- a/2-mandatory/3-shopping-list.js
+++ b/2-mandatory/3-shopping-list.js
@@ -18,9 +18,26 @@ let pantry = {
   cupboardContents: ["salt", "tinned tomatoes", "oregano"],
 };
 
+
+
 function createShoppingList(recipe) {
-  // write code here
-}
+  let shoppingList = {};
+  shoppingList.items =[];
+  shoppingList.name = recipe.name
+  // check ingredients
+  for (let ingredient of recipe.ingredients)
+  {
+    
+    if ( !pantry.fridgeContents.includes(ingredient) 
+    && !pantry.cupboardContents.includes(ingredient)) {
+    
+      shoppingList.items.push(ingredient);
+      
+    }
+  }
+  return shoppingList;
+};
+
 
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 3-shopping-list.js`
diff --git a/2-mandatory/4-restaurant.js b/2-mandatory/4-restaurant.js
index d7b81eea..6388141b 100644
--- a/2-mandatory/4-restaurant.js
+++ b/2-mandatory/4-restaurant.js
@@ -20,9 +20,23 @@ const MENU = {
 };
 
 let cashRegister = {
-  // write code here
+  orderBurger: function(balance){
+    if(balance >= MENU.burger){
+        return balance - MENU.burger
+    }else{
+      return balance;
+    } 
+  },
+  orderFalafel: function(balance){
+    if (balance >= MENU.falafel) {
+      return balance - MENU.falafel
+    }else{
+      return balance;
+    }
+  }
 }
 
+
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 4-restaurant.js`
 - To run all exercises/tests in the mandatory folder, run `npm test`
diff --git a/2-mandatory/5-writing-tests.js b/2-mandatory/5-writing-tests.js
index 1443608b..7a4ccbba 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 +43,56 @@ test("a score of 83 is grade A", () => {
   write a matching test
 */
 
-test.skip("a score of 71 is grade B", () => {
+test("a score of 71 is grade B", () => {
+    expect(convertScoreToGrade(71)).toBe("B");
   /* Remove the .skip above, then write the test body. */
 });
-/*
+
+test("a score of 68 is grade C", () => {
+  expect(convertScoreToGrade(68)).toBe("C");
+  /*
   Write a test that checks a score of 68 is grade C
 */
+});
 
+test("a score of 55 is grade D", () => {
+  expect(convertScoreToGrade(55)).toBe("D");
 /*
   Write a test that checks a score of 55 is grade D
 */
+});
 
+test("a score of 68 is grade C", () => {
+  expect(convertScoreToGrade(68)).toBe("C");
 /*
   Write a test that checks a score of 68 is grade C
 */
+});
 
+test("a score of 55 is grade D", () => {
+  expect(convertScoreToGrade(55)).toBe("D");
 /*
   Write a test that checks a score of 55 is grade D
 */
+});
 
+test("a score of 49 is grade E", () => {
+  expect(convertScoreToGrade(49)).toBe("E");
 /*
   Write a test that checks a score of 49 is grade E
 */
+});
 
+test("a score of 30 is grade E", () => {
+  expect(convertScoreToGrade(30)).toBe("E");
 /*
   Write a test that checks a score of 30 is grade E
 */
+});
 
-/*
+test("a score of 70 is grade B", () => {
+  expect(convertScoreToGrade(70)).toBe("B");
+  /*
   Write a test that checks a score of 70 is grade B
 */
+});
diff --git a/2-mandatory/6-writing-tests-advanced.js b/2-mandatory/6-writing-tests-advanced.js
index 8d227e27..c68f1f38 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) {
@@ -55,6 +55,16 @@ function formatCourseworkResult(trainee) {
     score: 63
   }
 */
+test("Trainee Xin, score of 63",() =>{
+  let trainee = {
+    name: "Xin",
+    score: 63,
+  };
+  expect(formatCourseworkResult(trainee)).toEqual(
+    `${trainee.name}'s coursework was marked as grade C.`
+  );
+});
+
 
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
@@ -63,6 +73,12 @@ function formatCourseworkResult(trainee) {
     score: 78
   }
 */
+test(`trainee Mona, score is 78`,() => {
+  let trainee ={ name:`Mona`, score: 78,}
+  expect(formatCourseworkResult(trainee)).toEqual(
+    `${trainee.name}'s coursework was marked as grade B.`
+  );
+})
 
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
@@ -73,6 +89,17 @@ function formatCourseworkResult(trainee) {
     subjects: ["JavaScript", "React", "CSS"]
   }
 */
+test(`trainee Ali , score is 49`, () => {
+  let trainee = {
+    name: "Ali",
+    score: 49,
+    age: 33,
+    subjects: ["JavaScript", "React", "CSS"],
+  };
+  expect(formatCourseworkResult(trainee)).toEqual(
+    `${trainee.name}'s coursework was marked as grade E.`
+  );
+})
 
 /*
   Write a test that checks the output of formatCourseworkResult when passed the following trainee:
@@ -81,6 +108,14 @@ function formatCourseworkResult(trainee) {
     age: 29
   }
 */
+test("Trainee , score of 90", () => {
+  let 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 +124,12 @@ function formatCourseworkResult(trainee) {
     subjects: ["HTML", "CSS", "Databases"]
   }
 */
+test("Trainee Aman, score of ", () => {
+  let trainee = {
+    name: "Aman",
+    subjects: ["HTML", "CSS", "Databases"],
+  };
+  expect(formatCourseworkResult(trainee)).toEqual(
+    `Error: Coursework percent is not a number!`
+  );
+});