Suppose the employees of the university are not billed for Registration for special class Class registration Prereq courses not completed Student Billing Student Bursar’s office Instructor <<Extends>> Suppose the employees of the university are not billed for tuition. Their spouses do not get a full tuition waiver, but pay only 25% of the total tuition. Extend the above use case diagram to capture these situations.

Student Bursar’s office Instructor Class registration Registration for <<Extends>> Class registration <<Extends>> Student Registration for special class Prereq courses not completed Student Billing Bursar’s office <<Extends>> Instructor Process employee tuition <<Extends>> Process spouse tuition

Customer Home Equity Loan Home Mortgage Loan Auto Loan Credit Card Assessment Credit History Check Home Owner Home buyer Auto buyer Applicant Assessor Credit Bureau Loan Officer <<uses>> <<uses>> <<uses>> <<uses>> <<uses>> <<uses>>

An auto rental company wants to develop an automated system to handle car reservations, customer billing and car auctions. Usually a customer reserves a car, picks it up, and then returns it after a certain period of time. At the time of pick up, the customer has the option to buy or waive collision insurance. When the car is returned, the customer receives a bill and pays the specified amount. Note that mileage should be recorded both at time of pick up and on return, in order to bill the appropriate amount. In addition to renting out cars, every six months or so, the company auctions the cars that have over 20,000 miles. Draw a use case diagram to capture the requirements of the system to be developed. Include an abstract use case for capturing the common behavior among any two use cases. Extend the diagram to capture corporate billing, where corporate customers are not directly billed; rather, the corporations they work for are billed and payments are made sometime later.

Reserve car Buy insurance Pick up car Customer Rental Clerk <extends> Buy insurance Pick up car <uses> Customer Rental Clerk Record mileage <uses> Return car Auction car <uses> <uses> <extends> Generate bill Generate bill for corporate customers