[2pt] Methods add_item and can_be_archived?

[ElsonOtake]

Implement methods: add_item() and can_be_archived?():

• add_item method in the Source 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)

• can_be_archived?() in the Movie class

• should override the method from the parent class

• should return true if parent's method returns true OR if silent equals true

• otherwise, it should return false