diff --git a/Answers/Admin.java b/Answers/Admin.java
new file mode 100644
index 0000000..c6a8365
--- /dev/null
+++ b/Answers/Admin.java
@@ -0,0 +1,18 @@
+public class Admin extends User {
+    private String password;
+    String uniqueAId;
+    public Admin(String name, String uniqueID, String phoneNumber, String password) {
+        super(name, uniqueID, phoneNumber);
+        this.password = password;
+        this.uniqueAId = uniqueID;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+    public String getUniqueId() {
+        return uniqueAId;
+    }
+
+}
+
diff --git a/Answers/Book.java b/Answers/Book.java
new file mode 100644
index 0000000..4f86d78
--- /dev/null
+++ b/Answers/Book.java
@@ -0,0 +1,66 @@
+public class Book {
+    private int bookID;
+    private String title;
+    private String author;
+    private boolean availability;
+    private String description;
+    private boolean onLoan;
+    private String borrower;
+    private static int nextid = 1;
+
+    public Book(String title, String author, String description) {
+        this.bookID = nextid++;
+        this.title = title;
+        this.author = author;
+        this.availability = true;
+        this.description = description;
+        this.onLoan = false;
+        this.borrower = null;
+    }
+
+    public int getBookID() {
+        return bookID;
+    }
+
+    public int getUniqueId() {
+        return bookID;
+    }
+    public void setUniqueId(int bookID){
+        this.bookID = bookID;
+    }
+    public String getTitle() {
+        return title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public boolean isAvailable() {
+        return availability;
+    }
+
+    public void setAvailability(boolean availability){
+        this.availability = availability;
+    }
+    public String getDescription() {
+        return description;
+    }
+
+    public boolean isOnLoan() {
+        return onLoan;
+    }
+
+    public String getBorrower() {
+        return borrower;
+    }
+    public void setOnLoan(boolean onLoan, String borrower) {
+        this.onLoan = onLoan;
+        this.borrower = borrower;
+    }
+    public String toString() {
+        return "ID: "+bookID+ "\nTitle: " + title + "\nAuthor: " + author + "\nSubtitle: " + description +
+                "\nAvailability: " + availability;
+    }
+}
+
diff --git a/Answers/Library.java b/Answers/Library.java
new file mode 100644
index 0000000..3d7c94d
--- /dev/null
+++ b/Answers/Library.java
@@ -0,0 +1,64 @@
+import java.util.ArrayList;
+import java.util.List;
+
+class Library {
+    private String name;
+    private int capacity;
+    private String operatingHours;
+    private static List<Book> books;
+    private List<Rent> rents;
+    private List<User> users;
+
+    public Library(String name, int capacity, String operatingHours) {
+        this.name = name;
+        this.capacity = capacity;
+        this.operatingHours = operatingHours;
+        this.books = new ArrayList<>();
+        this.rents = new ArrayList<>();
+        this.users = new ArrayList<>();
+    }
+
+    public void addBook(Book book) {
+        if (books.size() < capacity) {
+            books.add(book);
+            System.out.println("Book added to the library: " + book.getTitle());
+        } else {
+            System.out.println("Library is at full capacity. Cannot add more books.");
+        }
+    }
+        public static Book findBookById(int Id){
+        for (Book book : books){
+            if(book.getBookID() == Id){
+                book.setAvailability(false);
+                System.out.println("Book found "+book.getTitle());
+                return book;
+            }
+        }
+        System.out.println("Book not found in library");
+        return null;
+    }
+
+    public static void lendBook(int bookId, String borrower) {
+        Book book = findBookById(bookId);
+        if (book != null && !book.isOnLoan()) {
+            book.setOnLoan(true, borrower);
+            System.out.println("Book with ID " + bookId + " has been lent to " + borrower);
+        } else if (book != null && book.isOnLoan()) {
+            System.out.println("Book with ID " + bookId + " is already on loan");
+        } else {
+            System.out.println("Book with ID " + bookId + " not found in the library");
+        }
+    }
+    public static Book returnBook(int bookId) {
+        for (Book book : books){
+            if(book.getBookID() == bookId){
+                book.setAvailability(true);
+                System.out.println("Book found "+book.getTitle());
+                return book;
+            }
+        }
+        System.out.println("Book not found in library");
+        return null;
+    }
+}
+
diff --git a/Answers/MyApp.java b/Answers/MyApp.java
new file mode 100644
index 0000000..03552fc
--- /dev/null
+++ b/Answers/MyApp.java
@@ -0,0 +1,219 @@
+import javax.lang.model.element.Name;
+import java.util.*;
+public class MyApp {
+
+    public static void main(String[] args){
+        Library library= new Library("My Library" , 100 , "9:00 AM - 10:00 PM");
+        ArrayList<Admin> admin = new ArrayList<>();
+        admin.add(new Admin("Vania" , "40230212088","09333564285","1384"));
+        /**************************************************************************************************/
+        Book book1 = new Book("The Shadows Between Us","Tricia Levenseller" , "Fantasy");
+        Book book2 = new Book("Funny Story","Emily Henry" , "Comedy");
+        Book book3 = new Book("The Women","Kristin Hannah" , "Homeric");
+        List<Book> bookList = new ArrayList<>();
+        bookList.add(book1);
+        bookList.add(book2);
+        bookList.add(book3);
+        library.addBook(book1);
+        library.addBook(book2);
+        library.addBook(book3);
+        Scanner enter = new Scanner(System.in);
+        String choice , name , password , command , Name , Password , Command ;
+        boolean m = true, t = true, n = true;
+        System.out.println("Welcome to my library.");
+        /********************************************************************************************/
+        while (m){
+            System.out.println("Identify yourself: ");
+            System.out.println("1.Admin");
+            System.out.println("2.User");
+            System.out.println("3.Exit");
+            choice = enter.nextLine().trim().toLowerCase();
+            switch (choice){
+                case "admin":
+                    while (t) {
+                        System.out.println("Enter your name: ");
+                        name = enter.nextLine().trim().toLowerCase();
+                        if (name.equals("Vania") || name.equals("vania")) {
+                            System.out.println("Enter password: ");
+                            password = enter.nextLine().trim().toLowerCase();
+                            if (password.equals("1384")) {
+                                System.out.println("Hi Vania!");
+                                do {
+                                    System.out.println("What you want to do? (instead of using space write\"/\"(not for books name) and dont use <>");
+                                    System.out.println("If you need help use(lib/-h) or you can \"Exit\"");
+                                    command = enter.nextLine();
+                                    CheekAdminCommand(command, bookList, admin , library);
+                                } while (!command.equals("Exit"));
+                                t = false;
+                            } else {
+                                System.out.println("Wrong password.");
+                            }
+                        } else {
+                            System.out.println("Wrong name.");
+                        }
+                    }
+                    break;
+                    /****************************************************************************************/
+                case "user":
+                    while (n) {
+                        System.out.println("Enter your name: ");
+                        Name = enter.nextLine().trim().toLowerCase();
+                        if (Name.equals("vani")) {
+                            System.out.println("Enter your password: ");
+                            Password = enter.nextLine().trim().toLowerCase();
+                            if (Password.equals("1111")) {
+                                System.out.println("Hi!");
+                                do {
+                                    System.out.println("What you want to do? (instead of using space write\"/\"(not for books name) and dont use <>");
+                                    System.out.println("If you need help use(lib/-h) or you can \"Exit\"");
+                                    Command = enter.nextLine().toLowerCase().trim();
+                                    CheekUserCommand(Command, bookList);
+                                } while (!Command.equals("Exit"));
+                                n = false;
+                            } else {
+                                System.out.println("Wrong password.");
+                            }
+                        } else {
+                            System.out.println("Wrong user name.");
+                        }
+                    }
+                    break;
+                    /***************************************************************************************/
+                case "exit":
+                    System.out.println("bye bye:)");
+                    m = false;
+                    break;
+                default:
+                    System.out.println("It's wrong.");
+            }
+        }
+    }
+/*********************************************************************************************************/
+    public static void CheekAdminCommand(String command , List<Book> books , List<Admin> admins , Library library){
+        String[] cheekcommand = command.split("/");
+        if(cheekcommand[0].equals("lib")){
+            if(cheekcommand[1].equals("-h")){
+                System.out.println("lib/add/book/<name>/<author>/<subtitle>. --> Add a new book to the library.\n" +
+                        "lib/get/hrs. --> Retrieve library operating hours.\n" +
+                        "lib/add/member/<name>/<studentID>/<PhoneNumber>/<password>. --> Add a new member to the library.\n" +
+                        "lib/remove/member/<memberID>. --> Remove a member from the library.\n" +
+                        "lib/get/available/books. --> View available books." );
+            }
+            else if(cheekcommand[1].equals("add")){
+
+                if (cheekcommand[2].equals("book")){
+                    Book book4 = new Book(cheekcommand[3],cheekcommand[4],cheekcommand[5]);
+                    books.add(book4);
+                    library.addBook(book4);
+                    System.out.println("Book added successfully");
+
+                }
+                else if (cheekcommand[2].equals("member")) {
+                    admins.add(new Admin(cheekcommand[3],cheekcommand[4],cheekcommand[5],cheekcommand[6]));
+                    System.out.println("New Admin added successfully");
+                }
+                else{
+                    System.out.println("Wrong command.");
+                }
+
+            }
+            else if (cheekcommand[1].equals("get")) {
+
+                if (cheekcommand[2].equals("hrs")){
+                    System.out.println("Library is open from 9.am to 10.pm");
+
+                }
+                else if (cheekcommand[2].equals("available")){
+                    for (Book book : books){
+                        System.out.println("************************************************");
+                        System.out.println(book.toString());
+                    }
+                }
+                else{
+                    System.out.println("Wrong command.");
+                }
+            }
+            else if (cheekcommand[1].equals("remove")) {
+                String uniqueAId = cheekcommand[3];
+                removeAdmin(uniqueAId,admins);
+            }
+            else {
+                System.out.println("Its Wrong.");
+            }
+
+        }
+        else if (cheekcommand[0].equals("Exit")){
+            System.out.println("leaving Admin panel.");
+        }else {
+            System.out.println("Wrong command.");
+        }
+    }
+/*********************************************************************************************************/
+    public static void CheekUserCommand(String command , List<Book> books){
+        String[] cheekcommand = command.split("/");
+        if (cheekcommand[0].equals("lib")) {
+            if(cheekcommand[1].equals("-h")){
+                System.out.println("lib/get/hrs. --> Retrieve library operating hours.\n" +
+                        "lib/rent/<bookId>. -->  Rent a book from the library.\n" +
+                        "lib/rent/<bookId>/<memberName>. -->  Rent a book for a specific member.\n" +
+                        "lib/get/available/books. -->  View available books for rental.\n" +
+                        "lib/return/<bookName>. -->  Return a rented book to the library.\n");
+            }
+            else if (cheekcommand[1].equals("rent")) {
+                if (cheekcommand.length == 6) {
+                    int number = Integer.parseInt(cheekcommand[2]);
+                    String memberName = cheekcommand[3];
+                    Library.lendBook(number,memberName);
+                }
+                else {
+                    int number = Integer.parseInt(cheekcommand[2]);
+                    Library.findBookById(number);
+                }
+
+            } else if (cheekcommand[1].equals("get")) {
+                if (cheekcommand[2].equals("hrs")) {
+                    System.out.println("Library is open from 9.am to 10.pm");
+                }
+                else if (cheekcommand[2].equals("available")) {
+                    for (Book book : books){
+                        System.out.println("************************************************");
+                        System.out.println(book.toString());
+                    }
+                }
+                else {
+                    System.out.println("Wrong command.");
+                }
+            }
+            else if (cheekcommand[1].equals("return")) {
+                int number = Integer.parseInt(cheekcommand[2]);
+                Library.returnBook(number);
+            }
+            else {
+                System.out.println("Wrong command.");
+            }
+        }
+        else if (cheekcommand[0].equals("Exit")){
+            System.out.println("leaving User panel.");
+        }else {
+            System.out.println("Wrong command.");
+        }
+    }
+/*********************************************************************************************************/
+    private static void removeAdmin(String uniqueAId , List<Admin> admins){
+        Iterator<Admin> iterator = admins.iterator();
+        boolean found = false;
+        while (iterator.hasNext()){
+            Admin admin = iterator.next();
+            if (admin.getUniqueId().equals(uniqueAId)){
+                iterator.remove();
+                found = true;
+                break;
+            }
+        }
+        if(!found){
+            System.out.println("There isn't admin with this id.");
+        }else {
+            System.out.println("Admin deleted.");
+        }
+    }
+}
diff --git a/Answers/NormalUser.java b/Answers/NormalUser.java
new file mode 100644
index 0000000..1b588f6
--- /dev/null
+++ b/Answers/NormalUser.java
@@ -0,0 +1,17 @@
+import java.util.Date;
+class NormalUser extends User {
+    private Date registrationDate;
+
+    public NormalUser(String name, String uniqueID, String phoneNumber) {
+        super(name, uniqueID, phoneNumber);
+        this.registrationDate = new Date();
+    }
+
+    public Date getRegistrationDate() {
+        return registrationDate;
+    }
+
+    public void setRegistrationDate(Date registrationDate) {
+        this.registrationDate = registrationDate;
+    }
+}
diff --git a/Answers/Rent.java b/Answers/Rent.java
new file mode 100644
index 0000000..e53560a
--- /dev/null
+++ b/Answers/Rent.java
@@ -0,0 +1,14 @@
+import java.util.Date;
+class Rent {
+    private Book book;
+    private NormalUser normalUser;
+    private int rentalID;
+    private Date rentalDate;
+    public Rent(Book book, NormalUser normalUser, int rentalID, Date rentalDate) {
+        this.book = book;
+        this.normalUser = normalUser;
+        this.rentalID = rentalID;
+        this.rentalDate = rentalDate;
+    }
+
+}
diff --git a/Answers/User.java b/Answers/User.java
new file mode 100644
index 0000000..6562b1f
--- /dev/null
+++ b/Answers/User.java
@@ -0,0 +1,36 @@
+class User {
+    private String name;
+    private String uniqueID;
+    private String phoneNumber;
+
+    public User(String name, String uniqueID, String phoneNumber) {
+        this.name = name;
+        this.uniqueID = uniqueID;
+        this.phoneNumber = phoneNumber;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getUniqueID() {
+        return uniqueID;
+    }
+
+    public void setUniqueID(String uniqueID) {
+        this.uniqueID = uniqueID;
+    }
+
+    public String getPhoneNumber() {
+        return phoneNumber;
+    }
+
+    public void setPhoneNumber(String phoneNumber) {
+        this.phoneNumber = phoneNumber;
+    }
+}
+