Write a subclass called SavingsAccount that extends Account and adds an interest rate variable. Write a constructor with 3 argum
ents (name, balance, interest rate) for the SavingsAccount class that uses the super constructor. Write a toString() method for SavingsAccount that returns a call to the super toString() method and the interest rate. Write an equals method for SavingsAccount that calls the superclass equals method and checks that the interest rates are equal.
