a) Draw a sequence diagram for online shopping in a retail store. If the customer is using the website for
the first time to order he/she needs to register. After login a customer can select the items and view their
details. The items can be added to the shopping cart one by one. The order will be placed at the end. Once
the customer wishes to place the order the system will be requesting to enter the credit card details to
finalize the payment. The card details are verified from the bank. On receiving the verification of the
payment the order of the customer is acknowledged and shipped.
b) Description from the given scenario point of view for the sequence diagram. (Maximum 150 words.)