Read Dennis et al. Chapter 6: Minicase 2. Work through it and answer the questions. See the attached example. Based on the structural model you created in Chapter 5 and the problem description in Chapter 5, create a functional model (use case diagram, activity diagrams, and use case descriptions) for the business processes associated with the Holiday Travel Vehicles sales system. Create a sequence and a communication diagram for each scenario of each use case identified in the functional model. Create a behavioral state machine for each of the complex classes in the class diagram. Perform a CRUD analysis to show the interactivity of the objects in the system. Perform a verification and validation walkthrough of each model: functional, structural, and behavioral.