Question 3 (Abstract Classes): 5 Points

1. Define an abstract class called Savable:

public abstract class Savable {

// ONE variable called : SAVING_RATE of type double and set to 0.2

// One abstract method called apply_savings() that takes the number of years as input argument and returns the applied savings rate.

}

2.1 Let the class BankAccount extend the Savable class. Complete the class definition below:

public class BankAccount {

2.2 The BankAccount class will override the apply_savings() inherited from the Savable class where it will return the product between the BankAccount balance field and the input argument defining the number of years. Complete the code below:

// DO all necessary checks (input argument cannot be negative!)!

@Override

apply_savings( ) {

}