Describe SIX use case scenarios from this case study : A retail business wishes to automate some of its sales procedures. The retailer buys items in bulk from various manufacturers and re$-$sells them to the public at a profit. Preliminary interviews reveal that there is a number of staff roles in the Sales department. A salesperson can place orders on behalf of customers and check the status of these orders. A technical salesperson has the same duties but additionally is able to provide customers with detailed technical advice $($which we would not expect an ordinary salesperson to be able to do$).$ A sales supervisor is a salesperson, with the additional responsibility of creating new customer accounts and checking their creditworthiness. A dispatcher is responsible for collecting the goods ordered from the warehouse and packing them for dispatch to the customer. To assist in this operation, the computer system should be able to produce a list of unpacked orders as well as delete the orders from the list that the dispatcher has packed. All staff are able to find general details of the products stocked, including stock levels and locations in the warehouse. A re$-$ordering clerk is responsible for finding out which products are out of stock in the warehouse, and placing orders for these products from the manufacturers. If these products are required to satisfy an outstanding order, they are considered to be priority products, and are ordered first. The system should be able to advise the re$-$order clerk of which products are priority products. A stock clerk is responsible for placing items that arrive from manufacturers in their correct places in the warehouse. To do this the clerk needs to be able to find the correct warehouse location for each product from the computer system. Currently, the same person in the business plays the roles of stock clerk and re$-$order clerk. $[30]$