Given the document, fill the blank in the use case descriptions

Case study Classes and Collaborations for CD selections-Place Order Given the functional requirements for the "Place CD Orders" use case and its use case description in the following Functional requirements 1. Customers will access the Internet sales system to look for CDs of interest. Some customers will search 2. When the customer has found all the CDs to buy, the customer will check out by providing information for 3. The system will yerity the customer's credit card information with an online credit card clearance center 4. Customers will also be able to see if their preferred stores have the CDs for pickup. They will use zip code for CDs with specific titles or CDs by specific artists, whereas other customers may want to browse for interesting CDs in certain categories both personal and order and either accept the order or reject it to find stores close to their location. a. If the CD is available at a preferred store, a customer can immediately place a hold on the CD in stock and then come into the store and pick it up If the CD is not available in the customer's preferred store, the customer can request that the CD be special ordered to that store for later pickup. The customer will be notfied by e-mail when the requested CD arrives at the requested store; the CD will be placed on hold. This process will work similarly to the current special order systems already available in the regular stores b. Use case descriptions Scope: Priority: order Placement -/10 Summary: Customers scanch the Web site and glacs.ondors Primary Actor Customer Supporting Actos Stakeholden:Custioner- was 1o seard w i to purchase CD ncluda: Maintain Oeder, Check.out PreconditionCustomer visits the web site Trigger Normal Flow Customor places ordsr I Customer subunits a search roquest to the system. 2 The sysicm provides the customer a list of recommended CDs 3 The customer chooses one of the CDs to find cut additional information 4. The system provides the customer with basic information and reviews on the CD 5 The customer calls the Mamainordermoa e. 6. The oustomer iterates over 3 through 5 until dose shopping. 7. The customer executes the Checkeut-use-case. s. The customer Icaves the web site Sub-Flows 3,1. The customer submits a new search request to the system, 3.a-2. The customer iterates over steps 2 through 3 until satisfied with scarch results or gives up. 7.a. The customer aborts the order Alternate Flow/ Post-Condition: Customer makes a search request andlor places an order Open Issues: Source: Author