Consider a banking system with 3 classes: BankAccount, CheckingAccount, and SavingsAccount, that you are to design and write. Have CheckingAccount and SavingsAccount inherit from BankAccount. In BankAccount, you should include an account number, an account balance, a deposit method, a toString method, and an abstract withdraw method. Since deposits work the same way in both child classes, make sure they cannot override it. The constructor should only take an initial deposit and generate a random 5 digit account number. The toString should display the account number and the balance.

In the CheckingAccount class add a minimum balance and a standard overdraft fee of $25. Implement the withdraw method so that overdrafts are allowed, but the overdraft fee is incurred if the balance drops below the minimum balance. Override the toString method to display everything the BankAccount toString displays plus the minimum balance. Use the parent class toString to do most of the work.

In the SavingsAccount class add an annual interest rate (with a default value of 1.5%) and a method to recalculate the balance every month. Since the interest rate is annual, make sure to calculate the interest accordingly. Override the toString method to display everything the BankAccount toString displays plus the interest rate. Like the CheckingAccount toString, you should use the parent class to do most of the work.

1. Write the Java implementation of the BankAccount. Note: no driver is required.