Question 3: a) Suppose we want to create a Customer class and a VIPCustomer class (where VIP customers are a special type of customer that is participating in the rewards program and has access to special deals). Assuming one of them must be a subclass of the other, which should be a subclass of which? Using comments, explain your answer. b) Suppose we want to create a Customer class and a CustomerDatabase class (where we store all our customers). Which should be a subclass of which, or should neither of them be a subclass of the other? Again, explain your answer using comments