create a design class diagram based on the following information and a system

MoveYourBooksNow.com Book Exchange

MoveYourBooksNow.com is a book exchange that does business entirely on the Internet. The company acts as a clearinghouse for buyers and sellers of used books.

To offer books for sale, a person must register with MoveYourBooksNow.com . The person must provide a current physical address and telephone number as well as a current e-mail address. The system maintains an open account for this person. Access to the system as a seller is through a secure, authenticated portal.

A seller can list books on the system through a special Internet form. Information required includes all the pertinent information about the book, its category, its general condition, and the asking price. A seller may list as many books as desired. The system maintains information of all books in the system and enables buyers to search for books by title, author and category

People who want to buy books come to the site and search for the books they want. If they decide to buy, they must first open an account with a credit card to pay for the books if they are a first time buyers. Existing account holders log in. The system maintains all this information on secure servers.

When a request to purchase is made and the payment is sent, MoveYourBooksNow.com sends an e-mail notice to the seller of the book. It also marks the book as sold. The system maintains an open order until it receives an update from the seller that the book has been shipped. After the seller receives notice that a listed book has been sold, the seller must acknowledge the sale to the buyer via e-mail within 48 hours and ship the order must be made within a further 24 hours again notifying the buyer by email. All emails are generated within the system.

After receiving notice of shipment, MoveYourBooksNow.com maintains the order in shipped status. At the end of each month, a check is mailed to each seller for the book orders that have been in shipped status for at least 30 days. The 30-day waiting period allows the buyer to notify MoveYourBooksNow.com if the shipment doesn't arrive for some reason or if the book isn't in the same condition as advertised.

If they want, buyers can enter a service code for the seller. The service code is an indication of how well the seller is servicing book purchases. Some sellers are very active and use MoveYourBooksNow.com as a major outlet for selling books. Thus, a service code is an important indicator to potential buyers.