Qa$3.$ Draw a use case diagram for the situation described below:Maximum Software is a developer and supplier of software products to individuals and businesses. As part of their operations, Maximum provides a $1-800$ help desk line for clients who have questions about software purchased from Maximum. When a call comes in$,$ an operator inquiries about the nature of the call. For calls that are not truly help desk functions, the operator redirects the call to another unit of the company $($such as Order Processing or Billing$).$ Because many customer questions require in$-$depth knowledge of a product, help desk consultants are organized by product. The operator directs the call to a consultant skilled on the software that the caller needs help with. Because a consultant is not always immediately available, some calls must be put into a queue for the next available consultant.Once a consultant answers the call, the consultant determines if this is the first call from this customer about a particular problem. If it is$,$ the consultant creates a new call report to keep track of all information about the problem. If it is not the first call about a problem, the consultant asks the customer for a call report number and retrieves the open call report to determine the status of the inquiry. If the caller does not know the call report number, the consultant collects other identifying information such as the callers name, the software involved, or the name of the consultant who has handled the previous calls on the problem in order to conduct a search for the appropriate call report. If a resolution of the customers problem has been found, the consultant informs the client as to what that resolution is$,$ indicates on the report that the customer has been notified, and closes out the report. If resolution has not been discovered, the consultant finds out if the consultant who handled the previous call for this problem is on duty. If so$,$ he or she transfers the call to the other consultant $($or puts the call into the queue of calls waiting to be handled by that consultant$).$Once the proper consultant receives the call, that consultant records any new details the customer may have. For continuing problems and for new call reports, the consultant tries to discover an answer to the problem by using the relevant software and looking up information in reference manuals. If the consultant can now resolve the problem, the consultant tells the customer how to deal with the problem and closes the call report. Otherwise, the consultant files the report for continued research and tells the customer that someone at Maximum will get back to him or her, and that if the customer discovers new information about the problem, he or she should call Maximum with the information, identifying the problem with a specified call report number.

Qa$1.$ An auto rental company wants to develop an automated system that can 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 pickup, the customer has the option to buy or waive collision insurance on the car. When the car is returned, the customer receives a bill and pays the specified amount. In addition to renting cars, every six months or so$,$ the auto rental company auctions the cars that have accumulated over $20,000$ miles. Draw a use case diagram for capturing 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 billed directly; rather, the corporations they work for are billed and payments are made sometime later.

Qa$2.$ Draw a use case diagram for the situation described in the first question in the DFD exercises.

Projects, Inc., is an engineering firm with approximately $500$ engineers of different types. The company keeps records on all employees, their skills, assigned projects, and the departments they work in$.$ New employees are hired by the personnel manager based on data in an application form and evaluations collected from other managers who interview the job candidates. Prospective employees may apply at any time. Engineering managers notify the personnel manager when a job opens and list the characteristics necessary to be eligible for the job. The personnel manager compares the qualifications of the available pool of applicants with the characteristics of an open job and then schedules interviews between the manager in charge of the open position and the three best candidates from the pool. After receiving evaluations on each interview from the manager, the personnel manager makes the hiring decision based upon the evaluations and applications of the candidates and the characteristics of the job and then notifies the interviewees and the manager about the decision. Applications of rejected applicants are retained for