Write a class named person with data attributes for a person's name, address, and telephone number. next write a class named customer that is a subclass of the person the customer class should have a data attribute for a customer number and a boolean attribute indicating whether the customer wishes to be on a mailing list. write a complete main program to prompt the user for all of the needed data, create a customer object, and print out the customer data using the __str__ method. remember that class attributes should be defined as private.