diff --git a/Exercises/day-1/object-exercise-3.js b/Exercises/day-1/object-exercise-3.js
index 24797ee..134c7d7 100644
--- a/Exercises/day-1/object-exercise-3.js
+++ b/Exercises/day-1/object-exercise-3.js
@@ -30,86 +30,86 @@
 
 const users = [
   {
-    _id: 'ab12ex',
-    username: 'Alex',
-    email: 'alex@alex.com',
-    password: '123123',
-    createdAt: '08/01/2020 9:00 AM',
+    _id: "ab12ex",
+    username: "Alex",
+    email: "alex@alex.com",
+    password: "123123",
+    createdAt: "08/01/2020 9:00 AM",
     isLoggedIn: false,
   },
   {
-    _id: 'fg12cy',
-    username: 'Asab',
-    email: 'asab@asab.com',
-    password: '123456',
-    createdAt: '08/01/2020 9:30 AM',
+    _id: "fg12cy",
+    username: "Asab",
+    email: "asab@asab.com",
+    password: "123456",
+    createdAt: "08/01/2020 9:30 AM",
     isLoggedIn: true,
   },
   {
-    _id: 'zwf8md',
-    username: 'Brook',
-    email: 'brook@brook.com',
-    password: '123111',
-    createdAt: '08/01/2020 9:45 AM',
+    _id: "zwf8md",
+    username: "Brook",
+    email: "brook@brook.com",
+    password: "123111",
+    createdAt: "08/01/2020 9:45 AM",
     isLoggedIn: true,
   },
   {
-    _id: 'eefamr',
-    username: 'Martha',
-    email: 'martha@martha.com',
-    password: '123222',
-    createdAt: '08/01/2020 9:50 AM',
+    _id: "eefamr",
+    username: "Martha",
+    email: "martha@martha.com",
+    password: "123222",
+    createdAt: "08/01/2020 9:50 AM",
     isLoggedIn: false,
   },
   {
-    _id: 'ghderc',
-    username: 'Thomas',
-    email: 'thomas@thomas.com',
-    password: '123333',
-    createdAt: '08/01/2020 10:00 AM',
+    _id: "ghderc",
+    username: "Thomas",
+    email: "thomas@thomas.com",
+    password: "123333",
+    createdAt: "08/01/2020 10:00 AM",
     isLoggedIn: false,
   },
-]
+];
 
 const products = [
   {
-    _id: 'eedfcf',
-    name: 'mobile phone',
-    description: 'Huawei Honor',
+    _id: "eedfcf",
+    name: "mobile phone",
+    description: "Huawei Honor",
     price: 200,
     ratings: [
-      { userId: 'fg12cy', rate: 5 },
-      { userId: 'zwf8md', rate: 4.5 },
+      { userId: "fg12cy", rate: 5 },
+      { userId: "zwf8md", rate: 4.5 },
     ],
     likes: [],
   },
   {
-    _id: 'aegfal',
-    name: 'Laptop',
-    description: 'MacPro: System Darwin',
+    _id: "aegfal",
+    name: "Laptop",
+    description: "MacPro: System Darwin",
     price: 2500,
     ratings: [],
-    likes: ['fg12cy'],
+    likes: ["fg12cy"],
   },
   {
-    _id: 'hedfcg',
-    name: 'TV',
-    description: 'Smart TV:Procaster',
+    _id: "hedfcg",
+    name: "TV",
+    description: "Smart TV:Procaster",
     price: 400,
-    ratings: [{ userId: 'fg12cy', rate: 5 }],
-    likes: ['fg12cy'],
+    ratings: [{ userId: "fg12cy", rate: 5 }],
+    likes: ["fg12cy"],
   },
-]
+];
 // Imagine you are getting the above users collection from a MongoDB database.
-    // a. Create a function called signUp which allows user to add to the collection. If user exists, inform the user that he has already an account.
-    const newuser = {
-        _id: 'eedfcf',
-        username: 'John Doe',
-        email: 'johndoe@johndoe.com',
-        password: '123456',
-        createdAt: '08/01/2020 10:15 AM',
-        isLoggedIn: null,
-      };
+// a. Create a function called signUp which allows user to add to the collection. If user exists, inform the user that he has already an account.
+const newuser = {
+  _id: "eedfcf",
+  username: "John Doe",
+  email: "johndoe@johndoe.com",
+  password: "123456",
+  createdAt: "08/01/2020 10:15 AM",
+  isLoggedIn: null,
+};
 
 //     const signUp = (newuser) => {
 
@@ -138,69 +138,64 @@ const products = [
 //         }
 //     }
 //     signUp(newuser);
- 
 
-        // b. Create a function called signIn which allows user to sign in to the application
-        const signIn  = (newuser) => {
-            const exists = users.find(user => user._id === newuser._id);
-            if (exists){
-                exists.isLoggedIn = true;
-                console.log ("user signIn success")
-            }
-            else{
-                exists.isLoggedIn = false;
-                console.log ("account does not exist")
-            }
-            
-        }
+// b. Create a function called signIn which allows user to sign in to the application
+const signIn = (newuser) => {
+  const exists = users.find((user) => user._id === newuser._id);
+  if (exists) {
+    exists.isLoggedIn = true;
+    console.log("user signIn success");
+  } else {
+    exists.isLoggedIn = false;
+    console.log("account does not exist");
+  }
+};
 
 // The products array has three elements and each of them has six properties.
-      const product =[
-          {
-            _id: 'eedfcf',
-            name: 'Mobile phone',
-            description: 'Huawei Honor',
-            price: 200,
-            ratings: [
-              { userId: 'fg12cy', rate: 5 },
-              { userId: 'zwf8md', rate: 4.5 },
-            ],
-            likes: [],
-          },
-          {
-            _id: 'aegfal',
-            name: 'Laptop',
-            description: 'MacPro: System Darwin',
-            price: 2500,
-            ratings: [],
-            likes: ['fg12cy'],
-          },
-          {
-            _id: 'hedfcg',
-            name: 'TV',
-            description: 'Smart TV: Procaster',
-            price: 400,
-            ratings: [{ userId: 'fg12cy', rate: 5 }],
-            likes: ['fg12cy'],
-          },
-        ]
+const product = [
+  {
+    _id: "eedfcf",
+    name: "Mobile phone",
+    description: "Huawei Honor",
+    price: 200,
+    ratings: [
+      { userId: "fg12cy", rate: 5 },
+      { userId: "zwf8md", rate: 4.5 },
+    ],
+    likes: [],
+  },
+  {
+    _id: "aegfal",
+    name: "Laptop",
+    description: "MacPro: System Darwin",
+    price: 2500,
+    ratings: [],
+    likes: ["fg12cy"],
+  },
+  {
+    _id: "hedfcg",
+    name: "TV",
+    description: "Smart TV: Procaster",
+    price: 400,
+    ratings: [{ userId: "fg12cy", rate: 5 }],
+    likes: ["fg12cy"],
+  },
+];
 
-    // a. Create a function called rateProduct which rates the product
-    const rateproduct = (productId , userid , rate ) => {
-        const product = product.find (item=>productId===item._id)
-        if (product){
-            const exixst = product.ratings.find(rating => userid===rating.userId)
-            if(exixst){
-                console.log("user already rated this product")
-            }
-            else{
-                product.rating.push({userid ,rate})
-            }
-        }
-        else{
-            console.log("product not found")
-        }
+// a. Create a function called rateProduct which rates the product
+const rateproduct = (productId, userid, rate) => {
+  const product = product.find((item) => productId === item._id);
+  if (product) {
+    const exixst = product.ratings.find((rating) => userid === rating.userId);
+    if (exixst) {
+      console.log("user already rated this product");
+    } else {
+      product.rating.push({ userid, rate });
     }
-    // b. Create a function called averageRating which calculate the average rating of a product
+  } else {
+    console.log("product not found");
+  }
+};
+// b. Create a function called averageRating which calculate the average rating of a product
 
-// Create a function called likeProduct. This function will helps to like to the product if it is not liked and remove like if it was liked.
\ No newline at end of file
+// Create a function called likeProduct. This function will helps to like to the product if it is not liked and remove like if it was liked.