diff --git a/src/index.test.ts b/src/index.test.ts
index 544440e..3b52354 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -11,7 +11,7 @@ describe('computedProperties', () => {
 
     const prop1 = "property1"
     const prop2 = "property2"
-    const expected = { 1: "property1", 2: "property2" };
+    const expected = { "property1": "panda", "property2": "salad" };
 
     const actual = computedProperties(prop1, prop2)
 
@@ -20,16 +20,6 @@ describe('computedProperties', () => {
 });
 
 describe('createNewCar', () => {
-  it('should return the object that is passed to it', () => {
-
-    const car = { make: "vw", model: "thing", value: 345 }
-    const expected = { make: "vw", model: "thing", value: 345 };
-
-    const actual = createNewCar(car);
-
-    expect(actual).toEqual(expected);
-  });
-
   it('should return an object with different key attributes using the object passed to it', () => {
 
     const car = { make: "vw", model: "thing", value: 345 }
@@ -146,10 +136,8 @@ describe('addUserAndId', () => {
     }
 
     const new_user = {
-      "D": {
         "id": "D",
         "name": "Katlin"
-      }
     };
 
     const expected = {
@@ -203,11 +191,9 @@ describe('addUserAndIdInRegularOrder', () => {
     }
 
     const new_user = {
-      "D": {
-        "id": "D",
-        "name": "Katlin"
-      }
-    };
+      "id": "D",
+      "name": "Katlin"
+  };
 
     const expected = {
       items: {
diff --git a/src/index.ts b/src/index.ts
index f270d06..f94e5e1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,30 +16,66 @@ export interface Users {
 }
 
 export interface User_Repository {
-  readonly items: object,
-  readonly sort: Array<string>
+  readonly items: Record<string, User>,
+  readonly sort: string[];
 }
 
 
-export const computedProperties = (prop1: string, prop2: string) => {
 
+export const computedProperties = (prop1: string, prop2: string) => {
+  const obj = {
+    [prop1]: "panda",
+    [prop2]: "salad"
+  }
+  return obj;
 }
 
 export const createNewCar = (car: Readonly<Car>) => {
+    const {make: Make, model: Model, value: Value} = car;
+    return {
+      Make, 
+      Model, 
+      Value}
+  }
 
-}
 export const addUser = (users: Readonly<Users>, user: User) => {
-
+  return {
+    ...users,
+    [user.id]: user
+  }
 }
 
 export const reverseSortUsers = (user_repository: Readonly<User_Repository>) => {
-
+  const array = user_repository.sort.map(id => {
+      return (
+        user_repository.items[id]
+      )
+    }
+  )
+  return array;
 }
 
-export const addUserAndId = (user_repository: Readonly<User_Repository>, user: Users) => {
-
+export const addUserAndId = (user_repository: Readonly<User_Repository>, user: User) => {
+  console.log(user);
+  return {
+    items: {
+    ...user_repository.items,
+    [user.id]: user
+    },
+    sort: [user.id, ...user_repository.sort],    
+  }
 }
 
-export const addUserAndIdInRegularOrder = (user_repository: Readonly<User_Repository>, user: Users) => {
-
+export const addUserAndIdInRegularOrder = (user_repository: Readonly<User_Repository>, user: User) => {
+  const users = {
+    ...user_repository.items,
+    [user.id]: user
+  }
+  const sort = Object.keys(users).map(id => {
+    return id
+  })
+  return {
+    items: users,
+    sort: sort
+  }
 }
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