Prepare a use case test table for the use case in Figure 5.4.

Use case 01/02: Buy books (joins Order books and Pay order) 1. The customer provides keywords for searching books. 2. The system generates a list of books for sale that matches the keywords, including at least the title, author, price, page count, publisher, ISBN, and cover image. 3. The customer selects books from the list and indicates the desired quantity for each one. 4. The system generates the order summary (title, author, quantity, unit price, and subtotal for each book) and total value. 5. The customer finishes the order. 6. The customer decides: Save shopping cart: Variant 6a. Proceed to checkout: Variant 6b. Variant 6a: Save shopping cart 6a.1. The customer informs the system that the shopping cart should be saved. 6a.2. The system informs the customer how many days the cart will be available. Variant 6b: Proceed to checkout 6b.1. The system generates a list of registered addresses for the customer. 6b.2. The customer selects a delivery address. 6b.3. The system presents the delivery fee, the date scheduled for arrival and a list of credit cards already registered for the customer. 6b.4. The customer selects one of her cards for payment. 6b.5. The system sends to the respective credit card operator the following data: card number, owner's name, validity, security code, total purchase value, and code of the store. 6b.6. The credit card operator approves the sale by sending an authorization code. 6b.7. The system informs the customer that the sale was approved and supplies the tracking number. FIGURE 5.4