The user can search books, and viewbooks books without any payment. User can continue searching the books and view it as many times as they wish and add to the cart. Once added to the cart the system will prompt them to view card, edit card. After that they can confirm their orders then proceed to make payment. Payment can be made by credit card or PayPal. Once payment is successful the user can download the book.

Based on the scenario above, draw an activity diagram. No assumption made. Diagram must strictly follow to the scenario above.