An online shopping portal allows the customer to view different products. It also allows the customer to shop online saying delivery time and cost. Customer can browse through the products available in the shop, can select some of them and put into the shopping cart. Customer can change the items anytime in the cart either by adding new items or by removing existing items. Customer proceeds towards the payment counter. Finalizing product list of the items he/she finally wishes to buy and make the final payment. Authentication of the customer is done for the payment of the shopping through the card details. Payment in the online system can be done through Debit card or Credit card. Also, customer can choose special delivery or normal delivery category while choosing delivery type before done the payment. Special delivery takes only 2/3 working days for delivery whereas normal delivery takes 1 week to delivery products to the customer door. Special delivery costs some extra money whereas normal delivery is free. The portal provides a bill and a shipment ID which can be used to track the delivery status of the goods purchased by the customer. An administrator updates the details of the different categories and segments of the products by adding and deleting the products information and price of the products. Admin also verifies the customer card details and records the details for shipment of goods.

Question : draw Use case diagram, Activity diagram and Class diagram for the above online shopping portal.