Raghad Alobaid (alone because partner is absent)

src/objects.ts

@@ -1,3 +1,5 @@
+import { BookModule } from "@faker-js/faker/.";
+
 // don't change this interface
 interface Book {
   title: string;
@@ -27,8 +29,13 @@ function createBook(
   genre: string
 ): Book {
   // write your code here...
-
-  return {} as Book; // replace "{} as Book" with what you see is fit
+  const b : Book = {
+    title,
+    author,
+    publishedYear,
+    genre
+  }
+  return b; // replace "{} as Book" with what you see is fit
 }
 
 // DO NOT CHANGE THE LINE OF CODE BELOW (you can use it for testing your code)
@@ -51,7 +58,7 @@ const book = createBook(
 function printBookTitleAndYear(book: Book): string {
   // write your code here...
 
-  return ""; // replace empty string with what you see is fit
+  return book.title + " " + book["publishedYear"]; // replace empty string with what you see is fit
 }
 
 /**
@@ -66,7 +73,7 @@ function printBookTitleAndYear(book: Book): string {
  */
 function addPageCount(book: Book, pageCount: number): Book {
   // write your code here...
-
+  book.pageCount = pageCount
   return book;
 }
 
@@ -88,7 +95,7 @@ function addPageCount(book: Book, pageCount: number): Book {
  */
 function addISBN(book: Book, ISBN: string): Book {
   // write your code here...
-
+  book.ISBN=ISBN
   return book;
 }
 
@@ -110,7 +117,7 @@ function addISBN(book: Book, ISBN: string): Book {
  */
 function updatePublishedYear(book: Book, newYear: number): Book {
   // write your code here...
-
+  book["publishedYear"] = newYear
   return book;
 }
 
@@ -135,7 +142,11 @@ function updatePublishedYear(book: Book, newYear: number): Book {
  */
 function addSecondAuthor(book: Book, additionalAuthor: string): Book {
   // write your code here...
-
+  if (typeof book.author === 'string') {
+    book.author = [book.author, additionalAuthor];
+} else {
+  book.author.push(additionalAuthor);
+}
   return book;
 }