[3pt] Create an Author class with an association to the Item class (MEMBER #3)

[OnlyUnknown]

All Author class properties visible in the diagram should be defined and set up in the constructor method. add_item method in the Author class

• should take an instance of the Item class as an input
• should add the input item to the collection of items
• should add self as a property of the item object (by using the correct setter from the item object)

The following options should be available:

List all authors