diff --git a/src/objects.ts b/src/objects.ts
index ef6298f..83e95f6 100644
--- a/src/objects.ts
+++ b/src/objects.ts
@@ -1,3 +1,5 @@
+import { ad } from "@faker-js/faker/dist/airline-BcEu2nRk";
+
 // don't change this interface
 interface Book {
   title: string;
@@ -28,7 +30,13 @@ function createBook(
 ): Book {
   // write your code here...
 
-  return {} as Book; // replace "{} as Book" with what you see is fit
+  const carbook: Book = {
+    title: title,
+    author: author,
+    publishedYear: publishedYear,
+    genre: genre,
+  };
+  return carbook;
 }
 
 // DO NOT CHANGE THE LINE OF CODE BELOW (you can use it for testing your code)
@@ -50,8 +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"];
 }
 
 /**
@@ -65,6 +72,7 @@ function printBookTitleAndYear(book: Book): string {
  *   // => { title: "Hitchhiker's Guide to The Galaxy", author: "Douglas Adams", publishedYear: 1965, genre: "Sci-Fi", pageCount: 320 }
  */
 function addPageCount(book: Book, pageCount: number): Book {
+  book.pageCount = pageCount;
   // write your code here...
 
   return book;
@@ -88,10 +96,16 @@ function addPageCount(book: Book, pageCount: number): Book {
  */
 function addISBN(book: Book, ISBN: string): Book {
   // write your code here...
+  
+  book.ISBN = ISBN;
+  
+  
+
+
 
   return book;
 }
-
+// addISBN(book, "978-3-16-148410-0"); 
 /**
  * `updatePublishedYear` function:
  * - Accepts:
@@ -110,10 +124,12 @@ function addISBN(book: Book, ISBN: string): Book {
  */
 function updatePublishedYear(book: Book, newYear: number): Book {
   // write your code here...
-
+  
+  book.publishedYear = newYear;
   return book;
 }
 
+// updatePublishedYear(book, 2022);
 /**
  * `addSecondAuthor` function:
  * - Accepts:
@@ -135,10 +151,22 @@ function updatePublishedYear(book: Book, newYear: number): Book {
  */
 function addSecondAuthor(book: Book, additionalAuthor: string): Book {
   // write your code here...
+    if (Array.isArray(book.author)) {
+    book.author.push(additionalAuthor);
+  } else {
+    book.author = [book.author, additionalAuthor];
+  }
+
+  
+  
+  
+  
 
   return book;
 }
 
+
+
 export {
   createBook,
   printBookTitleAndYear,