When the user has successfully login to the system, the system will allow redirect the user to the catalog for browsing. Every time user select the product to purchase, it will be added to the shopping cart. This view catalog-adding item transitions can be done many time. When the user decide to finalize the purchasing, the checkout report will be shown. If the user confirm with the purchasing, then the user will pay the total payment. Otherwise, the user can go back to the shopping cart. After the payment transaction confirmed, then the user will logout the system. i. Draw a state transition diagram for the above