7.1 AND 7.2 BOTH OF THEM

Question is related to object-oriented modeling and design with UML

Exercises 7.1 Consider a physical bookstore, such as in a shopping mall. a. (2) List three actors that are involved in the design of a checkout system. Explain the rele- vance of each actor. b. (2) One use case is the purchase of items. Take the perspective of a customer and list another use case at a comparable level of abstraction. Summarize the purpose of each use case with a sentence. c. (4) Prepare a use case diagram for a physical bookstore checkout system. d. (3) Prepare a normal scenario for each use case. Remember that a scenario is an example, and need not exercise all functionality of the use case. e. (3) Prepare an exception scenario for each use case. f. (5) Prepare a sequence diagram corresponding to each scenario in (d). Consider a computer email system. a. (2) List three actors. Explain the relevance of each actor. b. (2) One use case is to get email. List four additional use cases at a comparable level of ab- straction. Summarize the purpose of each use case with a sentence. c. (4) Prepare a use case diagram for a computer email system. d. (3) Prepare a normal scenario for each use case. Remember that a scenario is an example, and need not exercise all functionality of the use case. e. (3) Prepare an exception scenario for each use case. f. (5) Prepare a sequence diagram corresponding to each scenario in (d). nu want to check airline Web sites to give 7.2