The goal of this assignment is to show a simple implementation of inheritance and polymorphism in Java GUI applications. 2. Define 2 classes Patient and Billing, whose objects are records for a clinic. Derive Patient from class Person. A Patient record has patient's name(defined in Person class) and an identification number(use string type). A Billing object will contain a Patient object and a Doctor object. Give your class appropriate getter and accessor methods and constructors and equals method. Write a driver program to test all your methods. Then write a test program to create at least two Patients and 2 Doctors, and at least 2 Billing records and then display the total income from the Billing records

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