1- After reading the narrative in question 1 under problems and exercises on page 150, given the following fully developed use case description, develop an activity diagram for this scenario.

2- Develop a System Sequence Diagram based on the activity diagram drawn for the scenario in question 1.

3- Identify the domain classes (data entities) involved and create a CRUD table showing the use case in question 1 and the domain classes identified.

Create a new sale A new cash sale Use Case Name: Scenarido Triggering Even Cash customer wants to purchase items Brief Description: A cash customer wants to purchase items. The clerk enters the item ID, and the system creates a sales ticket. Customer pays with cash, check or credit card Sales clerk Sales clerk Accounting department Sales department Inventory items must exist, New sale is created Sales line items are created and connected to the sale Pavment transaction is created Actors Stakeholders Preconditions Postconditions Flow of Activities: Actor System 1 Clerk starts new cash sale, 2.1 System finds item in inventory, finds price, displays information, adds to total 2, Clerk enters each item 3. Clerk indicates the end of the sale. 3.1 System calculates total. 4. Clerk indicates type of payment and 4.1 System processes payment and enters information. creates payment transaction Exception Conditions 2.1 If system has information missing, sales clerk calls manager and manually enters information 4.1 If customer credit card fails approval, require cash or cancel sale