(Solved): 2. In Assignment 4 (A4), a class diagram was derived according to the provided sequence diagram. In ...

2. In Assignment 4 (A4), a class diagram was derived according to the provided sequence diagram. In A3, a sequence diagram was constructed for the “Remove Book” use case. Use your “Remove Book” sequence diagram to update the class diagram that you had finished in A4. 3. In addition to adding or removing books, suppose that another feature of the online bookstore system is to allow the user modifying the quantity of an item in the shopping cart if the new amount is within the number of book copies on stock. Go through the Unified Process to update the class diagram you finished in A5.2 for this new use case. In the process, the OOA artifacts need to include a fully dressed use case and a system sequence diagram, and the OOD artifacts include a sequence diagram before updating the existing class diagram.