For Class FullName That Contains an __Init__ Method That Is

For class FullName that contains an __init__ method that is passed a first and last name to construct a new object with, define a subclass of the FullName class named FullNamePlus that also stores a person's middle name. The subclass should include an __init__ method, getter/setter methods, and a __str__ methods that displays a name in the form lastname, firstname middlename. (Assume that class FullName contains getter methods accessing the first and last names.)