You are required to design a sequence diagram for an online bookstore's order process. The system allows users to browse books, add them to a shopping cart, and place an order. The process involves interaction between the user, the system's frontend interface, the backend server, and the payment service.

Sequence of Events:

$1.$ The User browses books through the Web Interface.

$2.$ The User adds books to the shopping cart.

$3.$ The User requests to check out.

$4.$ The Web Interface sends an order request to the Backend Server.

$5.$ The Backend Server requests book details and inventory status from the Database.

$6.$ The Database sends the requested information to the Backend Server.

$7.$ The Backend Server calculates the total amount and sends a payment request to the Payment Service.

$8.$ The Payment Service processes the payment and sends a confirmation back to the Backend Server.

$9.$ The Backend Server updates the order status in the Database.

$10.$ The Database confirms the update.

$11.$ The Backend Server sends an order confirmation to the Web Interface.

$12.$ The Web Interface displays the order confirmation to the User.

Deliverables:

$1.$ A sequence diagram that visualizes the interactions between the User, Web Interface, Backend Server, Payment Service, and Database.

$2.$ The diagram should clearly depict the flow of messages and the sequence of operations from the moment a user adds a book to the cart until the order is confirmed.

$3.$ Ensure that the diagram includes alt frames for conditional flows, such as payment success and failure scenarios.

$4.$ Include notes or comments in the diagram to explain complex interactions or decisions.

Sequence diagram

$$ Online bookstore

$1.$ The customer begins the interaction by searching for a book by title.

$2.$

The system will return all books with that title.

$3.$ The customer can look at the book description.

$4.$

The customer can place a book in the shopping cart.

$5.$ The customer can repeat the interaction as many times as desired.

$6.$

The customer can purchase the items in the cart by checking out.

Draw a sequence diagram for the above mentioned problem statement.