Question 2: Sequence Diagrams

NEED QUESTION 2 ONLY!

1b: Shopping Cart Customer can place items in a shopping cart There can be multiple items per order An order goes through various states - incart, paid, fulfilled or cancelled . The system has the ability to return part or all of the items in an order Customer can make a payment using Cash, Credit, Debit or EBT . If a payment is declined, the order is cancelled What classes are in this system? What are their responsibilities? Which classes collaborate? Draw a class diagram for this system. Include relationships between classes (generalization and associational)