Problem 2 Enhance the BankAccount class and see how abstraction and encapsulation enable evolutionarv changes to software Begin with a simple enhancement: charging a fee for every deposit and withdrawal. Supply a mechanism for setting the fee and modify the deposit and withdraw methods so that the fee is levied. The initial transaction fee is 50 cents, and this can be changed later on. Test your class and check that the fee is computed correctly. Now make a more complex change. The bank will allow a fixed number of free transactions (deposits and withdrawals) every month, and charge for transactions exceeding the free allotment. The charge is not levied immediately but at the end of the month. The initial value for the number of free transactions is 10 Supply a new method deductMonthlycharge to the BankAccount class that deducts the monthly charge and resets the transaction count. (Hint: Use Math.max (actual transaction count , free transaction count) in your computation.) e . e Produce a test program that verifies that the fees are calculated correctly over several months. Problem3 Implement a Java program that directs a cashier how to give change. The program has two inputs: the amount due and the amount received from the customer. Display the dollars, quarters, dimes, nickels, and pennies that the customer should receive in return. In order to avoid round-off errors, the program user should supply both input amounts in pennies, for example 274 instead of $2. 74