1. A domain model class diagram.
2. A use case diagram.
3. A fully developed description for two use cases such as Add a seller and Record a book order.
4. A system sequence diagram for each of the two use cases in problem 3.

TheEyesHaveIt.com Book Exchange is a type of e-business exchange that does business entirely on the Internet. The company acts as a clearinghouse for both buyers and sellers of used books.
To offer books for sale, a person must register with Eyes Have It. The person must provide a current physical address and telephone number, as well as a current e-mail address. The system will then maintain an open account for this person. Access to the system as a seller is through a secure, authenticated portal.