Respond to the following questions given the Web-based online Shopping System description below: In the Web-based Online Shopping System, customers can request to purchase one or more items from the supplier. The customer provides personal details, such as address and credit card information. This information is stored in a customer account. If the credit card is valid, then a delivery order is created and sent to the supplier. The supplier checks the available inventory, confirms the order, and enters a planned shipping date. When the order is shipped, the customer is notified and the customers credit card account is changed.

A) Given the use case diagram, a use case description and activity diagram for one of use case (Browse Catalog), please respond to the following: 5. Draw the conceptual static model for the online shopping system (i.e., entity class model)

Given the object structuring criteria, please respond to the following:

b) Draw the sequence diagram for the Browse Catalog use case including message sequence descriptions.

Process Delivery Order Browse Catalog Confim Make Order Request and Bill Customer Supplier View Order 22.2.1 Use Case Description for Browse Catalog Use case name: Browse Catalog Summary: Customer browses World Wide Web catalog, views various cat- alog items from the supplier's catalog, and selects items from the catalog. Actor: Customer Precondition: Customer browser is linked to supplier catalog Web site Main sequence: 1. Customer requests to browse catalog. 2. System displays catalog information to customer. 3. Customer selects items from catalog 4. System displays an itemized list containing each item description and price, as well as the total price. Alternative sequence: Step 3: Customer does not select item and exits. Postcondition: System has displayed list of selected catalog items. Process Delivery Order Browse Catalog Confim Make Order Request and Bill Customer Supplier View Order 22.2.1 Use Case Description for Browse Catalog Use case name: Browse Catalog Summary: Customer browses World Wide Web catalog, views various cat- alog items from the supplier's catalog, and selects items from the catalog. Actor: Customer Precondition: Customer browser is linked to supplier catalog Web site Main sequence: 1. Customer requests to browse catalog. 2. System displays catalog information to customer. 3. Customer selects items from catalog 4. System displays an itemized list containing each item description and price, as well as the total price. Alternative sequence: Step 3: Customer does not select item and exits. Postcondition: System has displayed list of selected catalog items