(E-commerce) When shopping online, you select items and add them to a shopping cart. Duplicate items are permitted in a shopping cart, as you can purchase multiples of the same item. You also can remove an item from a shopping cart, if you change your mind about buying it. The shopping cart can show its current contents with their prices and the total cost of these items.

1. Draw a UML class diagram for MyShop class that implements one of the interfaces. Write an implementation class for the UML class diagram you draw for b. Use MyShop class name