A hotel reservation system supports the following functionality: (a) Room reservation (b) Changing the properties of a room (for example, from non-smoking to smoking) (c) Customer check-in (d) Customer check-out

Come up with system use cases for the above functionality. 4. We are building a system to track personal finances. We plan an initial version with minimal functionality: tracking the expenditures. (Each expenditure has a description, date and amount.) We show below the use case for creating a new expenditure item and a new income item. Actor System (1) Inputs a request to create a new expenditure item (2) Asks for description, date, and amount (3) Supplies the data (4) Creates an expenditure item and notifies the user Actor System (1) Inputs a request to create a new income item (2) Asks for description, date, and amount (3) Supplies the data (4) Creates an income item and notifies the user. (a) The use cases are quite weakly specified. In what ways? (Hint: Compare with the addition of a new member or book in the library system.) (b) What are the alternate flows in the use cases? Modify the two use cases to handle the alternate flows. (c) Identify the conceptual classes.

. Consider an information system to be created for handling the business of a supermarket. For each of the following, state if it is a possible class. If not, explain why not. Otherwise, why would you consider it to be a class? What is its role in the system? (a) Customer (b) Vegetable (c) Milk (d) Stock (e) Canned food (f) Quantity on hand for a product