Draw a use-case diagram for a college that would like to keep track of each graduate. In order to maintain strong ties to its alumni, the college holds various events. The college needs to keep track of which graduates have attended which events. The college keeps in contact with graduates by mail, email, telephone and fax to announce each event and keep graduate information up to date. The college would like to be able to produce a report showing the latest information about a graduate and the events the graduate attended.