diff --git a/Exercises/day-1/object-exercise-3.js b/Exercises/day-1/object-exercise-3.js
index 28b55bc..515414d 100644
--- a/Exercises/day-1/object-exercise-3.js
+++ b/Exercises/day-1/object-exercise-3.js
@@ -1,30 +1,30 @@
 // Exercises: Level 3
 
 // Create an object literal called personAccount. It has firstName, lastName, incomes, expenses properties and it has totalIncome, totalExpense, accountInfo,addIncome, addExpense and accountBalance methods. Incomes is a set of incomes and its description and expenses is a set of incomes and its description.
-const personAccount = {
-    firstName: 'fitsum',
-    lastName: 'helina',
-    incomes: [
-      { description: 'Salary', amount: 50000 },
-      { description: 'Bonus', amount: 10000 },
-    ],
-    expenses: [
-      { description: 'Rent', amount: 10000 },
-      { description: 'Groceries', amount: 5000 },
-    ],
-    totalIncome() {
-      return this.incomes.reduce((total, income) => total + income.amount, 0);
-    },
-    totalExpense() {
-      return this.expenses.reduce((total, expense) => total + expense.amount, 0);
-    },
-    accountInfo() {
-      return `Account Information: ${this.firstName} ${this.lastName}`;
-    },
-    addIncome(description, amount) {
-      this.incomes.push({ description, amount });
-    },
-}
+// const personAccount = {
+//     firstName: 'fitsum',
+//     lastName: 'helina',
+//     incomes: [
+//       { description: 'Salary', amount: 50000 },
+//       { description: 'Bonus', amount: 10000 },
+//     ],
+//     expenses: [
+//       { description: 'Rent', amount: 10000 },
+//       { description: 'Groceries', amount: 5000 },
+//     ],
+//     totalIncome() {
+//       return this.incomes.reduce((total, income) => total + income.amount, 0);
+//     },
+//     totalExpense() {
+//       return this.expenses.reduce((total, expense) => total + expense.amount, 0);
+//     },
+//     accountInfo() {
+//       return `Account Information: ${this.firstName} ${this.lastName}`;
+//     },
+//     addIncome(description, amount) {
+//       this.incomes.push({ description, amount });
+//     },
+// }
 
 // **** Questions:2, 3 and 4 are based on the following two arrays:users and products ()
 
@@ -102,7 +102,28 @@ const products = [
 ]
 // 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.
-    // b. Create a function called signIn which allows user to sign in to the application
+    const newuser = {
+        _id: 'abc123',
+        username: 'John Doe',
+        email: 'johndoe@johndoe.com',
+        password: '123456',
+        createdAt: '08/01/2020 10:15 AM',
+        isLoggedIn: false,
+      };
+    const signUp = (newuser) => {
+        const userexist = users.find((user) => user._id === newuser._id)
+        if (userexist) {
+            console.log('User already exists!')
+            return;
+        }
+        else{
+            users.push(newuser)
+            console.log('User added successfully!')
+        }
+    }
+    signUp(newuser);
+        
+        // b. Create a function called signIn which allows user to sign in to the application
 
 // The products array has three elements and each of them has six properties.
     // a. Create a function called rateProduct which rates the product