diff --git a/Answers/40130212091/.idea/.gitignore b/Answers/40130212091/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/Answers/40130212091/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Answers/40130212091/.idea/40130212091.iml b/Answers/40130212091/.idea/40130212091.iml
new file mode 100644
index 0000000..b107a2d
--- /dev/null
+++ b/Answers/40130212091/.idea/40130212091.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Answers/40130212091/.idea/misc.xml b/Answers/40130212091/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/Answers/40130212091/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/.idea/modules.xml b/Answers/40130212091/.idea/modules.xml
new file mode 100644
index 0000000..1c6f695
--- /dev/null
+++ b/Answers/40130212091/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/40130212091.iml" filepath="$PROJECT_DIR$/.idea/40130212091.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/.idea/vcs.xml b/Answers/40130212091/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/Answers/40130212091/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/Admin.java b/Answers/40130212091/Admin.java
new file mode 100644
index 0000000..cb5a1e1
--- /dev/null
+++ b/Answers/40130212091/Admin.java
@@ -0,0 +1,15 @@
+
+public class Admin extends User {
+
+    private String password, Id;
+    public Admin(String name ,String phoneNumber, String password){
+        super(name, phoneNumber);
+        this.password = password;
+    }
+
+    public String getPassword(){
+        return password;
+    }
+
+
+}
diff --git a/Answers/40130212091/Book.java b/Answers/40130212091/Book.java
new file mode 100644
index 0000000..fbc11fe
--- /dev/null
+++ b/Answers/40130212091/Book.java
@@ -0,0 +1,40 @@
+
+public class Book extends Library {
+    private int bookID;
+    private String title, author;
+    private boolean availabilityStatus;
+    private String description;
+
+    private int i = 100;
+
+    public Book(String name, String author, String subtitle){
+        this.title = name;
+        this.author = author;
+        this.description = subtitle;
+        this.availabilityStatus = true;
+        this.bookID = ++i;
+
+    }
+
+    public String getTitle(){
+        return title;
+    }
+
+    public String getAuthor(){
+        return author;
+    }
+
+    public boolean getAvailabilityStatus(){
+        return availabilityStatus;
+    }
+
+    public void setAvailabilityStatus(boolean c){
+        availabilityStatus = c;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+
+}
diff --git a/Answers/40130212091/Library.java b/Answers/40130212091/Library.java
new file mode 100644
index 0000000..9ebe67b
--- /dev/null
+++ b/Answers/40130212091/Library.java
@@ -0,0 +1,98 @@
+import java.util.ArrayList;
+
+public class Library{
+    private String libraryName = "myLibrary";
+    private int capacity = 350 ;
+
+    private String operatingHours = "8:00 _ 21:00";
+
+
+    private ArrayList<Book> bookList = new ArrayList<>();
+    private  ArrayList<NormalUser> userList = new ArrayList<>();
+    private ArrayList<Rent> rentList = new ArrayList<>();
+
+
+    public String getHours() {
+        return operatingHours;
+    }
+    public String getLibraryName(){
+        return libraryName;
+    }
+
+    public int getCapacity(){
+        return capacity;
+    }
+
+    public void addBook(String name, String author, String subtitle){
+        Book book = new Book(name, author, subtitle);
+        bookList.add(book);
+    }
+
+    public void addMember(String name, String phoneNumber){
+        NormalUser normalUser = new NormalUser( name,  phoneNumber);
+        userList.add(normalUser);
+    }
+
+    public void rentBook(String bookName, String userName){
+        for (int i = 0; i < userList.size(); i++){
+            if (userList.get(i).getName() == userName){
+                for (int j = 0; j < bookList.size(); j++){
+                    if (bookList.get(j).getTitle() == bookName){
+                        if (bookList.get(j).getAvailabilityStatus()){
+                            Rent rent = new Rent(userList.get(i), bookList.get(j));
+                            rentList.add(rent);
+                            System.out.println("successful");
+                            return;
+                        }
+                        else {
+                            System.out.println("Book Is Unavailable");
+                            return;
+                        }
+                    }
+                }
+                System.out.println("book not found");
+                return;
+            }
+        }
+        System.out.println("user not found");
+    }
+
+    public void removeMember(String memberId){
+        for (int i = 0; i < userList.size(); i++){
+            if (userList.get(i).getId() == memberId){
+                userList.remove(i);
+                System.out.println("successful");
+                return;
+            }
+        }
+        System.out.println("member not found");
+    }
+
+    public void returnBook(String bookName){
+        for (int i = 0; i < bookList.size(); i++){
+            if(bookList.get(i).getTitle() == bookName){
+                bookList.get(i).setAvailabilityStatus(true);
+                for (int j = 0; j < rentList.size(); j++){
+                    if (rentList.get(j).getBookObject().getTitle() == bookName){
+                        rentList.remove(j);
+                        System.out.println("successful");
+                        return;
+                    }
+                }
+                System.out.println("book not found");
+            }
+        }
+        System.out.println("book not found");
+    }
+
+
+    public void availableBooks(){
+        for (int i = 0; i < bookList.size(); i++){
+            if(bookList.get(i).getAvailabilityStatus()){
+                System.out.println(bookList.get(i).getTitle() + "\n");
+            }
+        }
+    }
+
+
+}
diff --git a/Answers/40130212091/MyApp.java b/Answers/40130212091/MyApp.java
new file mode 100644
index 0000000..77c7509
--- /dev/null
+++ b/Answers/40130212091/MyApp.java
@@ -0,0 +1,64 @@
+
+import java.util.Scanner;
+
+public class MyApp {
+
+    public static void main(String[] args) {
+        Library library = new Library();
+        System.out.println("Hello welcome to " + library.getLibraryName());
+        System.out.println("capacity : " + library.getCapacity());
+        System.out.println("enter a command");
+
+        Scanner command = new Scanner(System.in);
+        String input;
+        while (true) {
+            System.out.println("~~~  ");
+            input = command.nextLine();
+            if (input.equalsIgnoreCase("exit")) {
+                break;
+            }
+            commandLine(input.split(" "), library);
+        }
+        command.close();
+    }
+
+    public static void commandLine(String[] order, Library library) {
+        try {
+            if (order[1].equals("lib") && order[2].equals("add") && order[3].equals("book")) {
+                library.addBook(order[4], order[5], order[6]);
+            } else if (order[1].equals("lib") && order[2].equals("add") && order[3].equals("member")) {
+                library.addMember(order[4], order[5]);
+            } else if (order[1].equals("lib") && order[2].equals("rent")) {
+                library.rentBook(order[4], order[5]);
+            } else if (order[1].equals("lib") && order[2].equals("get") && order[3].equals("hrs")) {
+                System.out.println(library.getHours());
+            } else if (order[1].equals("lib") && order[2].equals("get") && order[3].equals("books")) {
+                library.availableBooks();
+            } else if (order[1].equals("lib") && order[2].equals("remove") && order[3].equals("member")) {
+                library.removeMember(order[4]);
+
+            } else if (order[1].equals("lib") && order[2].equals("return")) {
+                library.returnBook(order[4]);
+            } else if (order[1].equals("lib") && order[2].equals("help")) {
+                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 rent <bookName>: Rent a book from the library.\n" +
+                        "lib add member <studentID> <password>: Add a new member to the library (admin privilege required).\n" +
+                        "lib rent <bookName> <memberName> <memberID>: Rent a book for a specific member.\n" +
+                        "lib get available books: View available books for rental.\n" +
+                        "lib remove member <memberID>: Remove a member from the library (admin privilege required).\n" +
+                        "lib return <bookName>: Return a rented book to the library.\n" +
+                        "lib add admin <AdminName> <PhoneNumber>: Add a new admin to the library\n" +
+                        ">>> ");
+            }
+            else{
+                throw new Exception();
+            }
+        } catch(
+    Exception e)
+
+    {
+        throw new RuntimeException("enter a correct command");
+    }
+}
+}
diff --git a/Answers/40130212091/NormalUser.java b/Answers/40130212091/NormalUser.java
new file mode 100644
index 0000000..ebd1bd8
--- /dev/null
+++ b/Answers/40130212091/NormalUser.java
@@ -0,0 +1,15 @@
+public class NormalUser extends User {
+
+    private int Id;
+    private int j = 100;
+
+    public NormalUser(String name, String phoneNumber){
+        super(name, phoneNumber);
+        this.Id = ++j;
+    }
+
+    public String getId(){
+        return toString(Id);
+    }
+
+}
diff --git a/Answers/40130212091/Rent.java b/Answers/40130212091/Rent.java
new file mode 100644
index 0000000..a8f945c
--- /dev/null
+++ b/Answers/40130212091/Rent.java
@@ -0,0 +1,29 @@
+import java.util.Date;
+import java.util.HashMap;
+
+public class Rent extends Library {
+    private NormalUser normalUserObject;
+    private Book bookObject;
+    private long rentalDate;
+    private int RentalID;
+    Date date = new Date();
+
+    HashMap<String, String> rent = new HashMap<>();
+    private int c = 1;
+
+    public Rent(NormalUser normalUser, Book book){
+        this.normalUserObject = normalUser;
+        this.bookObject = book;
+        this.rentalDate = date.getTime();
+        RentalID = ++c;
+    }
+
+    public User getnormalUserObject(){
+        return normalUserObject;
+    }
+
+    public Book getBookObject(){
+        return bookObject;
+    }
+
+}
diff --git a/Answers/40130212091/User.java b/Answers/40130212091/User.java
new file mode 100644
index 0000000..1af65a0
--- /dev/null
+++ b/Answers/40130212091/User.java
@@ -0,0 +1,34 @@
+
+public class User extends Library{
+    private String name;
+    private String phoneNumber;
+
+    private int Id;
+
+
+    public User(String name, String phoneNumber){
+        this.name = name;
+        this.phoneNumber = phoneNumber;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public String getPhoneNumber(){
+        return phoneNumber;
+    }
+
+    public String getId(){
+        String IdStr = toString(Id);
+        return IdStr;
+    }
+
+    String toString(int id) {
+        return toString(id);
+    }
+
+    public User() {
+
+    }
+}
diff --git a/Answers/40130212091/out/production/40130212091/.idea/.gitignore b/Answers/40130212091/out/production/40130212091/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/Answers/40130212091/out/production/40130212091/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Answers/40130212091/out/production/40130212091/.idea/40130212091.iml b/Answers/40130212091/out/production/40130212091/.idea/40130212091.iml
new file mode 100644
index 0000000..b107a2d
--- /dev/null
+++ b/Answers/40130212091/out/production/40130212091/.idea/40130212091.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/Answers/40130212091/out/production/40130212091/.idea/misc.xml b/Answers/40130212091/out/production/40130212091/.idea/misc.xml
new file mode 100644
index 0000000..6f29fee
--- /dev/null
+++ b/Answers/40130212091/out/production/40130212091/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/out/production/40130212091/.idea/modules.xml b/Answers/40130212091/out/production/40130212091/.idea/modules.xml
new file mode 100644
index 0000000..1c6f695
--- /dev/null
+++ b/Answers/40130212091/out/production/40130212091/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/40130212091.iml" filepath="$PROJECT_DIR$/.idea/40130212091.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/out/production/40130212091/.idea/vcs.xml b/Answers/40130212091/out/production/40130212091/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/Answers/40130212091/out/production/40130212091/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Answers/40130212091/out/production/40130212091/Admin.class b/Answers/40130212091/out/production/40130212091/Admin.class
new file mode 100644
index 0000000..22e01ae
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/Admin.class differ
diff --git a/Answers/40130212091/out/production/40130212091/Book.class b/Answers/40130212091/out/production/40130212091/Book.class
new file mode 100644
index 0000000..465bd19
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/Book.class differ
diff --git a/Answers/40130212091/out/production/40130212091/Library.class b/Answers/40130212091/out/production/40130212091/Library.class
new file mode 100644
index 0000000..50051a7
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/Library.class differ
diff --git a/Answers/40130212091/out/production/40130212091/MyApp.class b/Answers/40130212091/out/production/40130212091/MyApp.class
new file mode 100644
index 0000000..a5ac040
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/MyApp.class differ
diff --git a/Answers/40130212091/out/production/40130212091/NormalUser.class b/Answers/40130212091/out/production/40130212091/NormalUser.class
new file mode 100644
index 0000000..d877988
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/NormalUser.class differ
diff --git a/Answers/40130212091/out/production/40130212091/Rent.class b/Answers/40130212091/out/production/40130212091/Rent.class
new file mode 100644
index 0000000..ba206f5
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/Rent.class differ
diff --git a/Answers/40130212091/out/production/40130212091/User.class b/Answers/40130212091/out/production/40130212091/User.class
new file mode 100644
index 0000000..154cbf2
Binary files /dev/null and b/Answers/40130212091/out/production/40130212091/User.class differ