What to turn in when you submit your work in edmodo.com:
* a. Copy and paste both programs
* b. Attach both files
* c. Output should be included in your tester/driver class as a comment
* d. Test all your code: Think of data that will force execution of all the lines of code.

Classwork:
Write a class SavingsAccount_YI that is similar to the BankAccount class, except that it has an added instance variable interest. Supply a constructor that sets both the initial balance and the interest rate. Supply a method addInterest (with no explicit parameter) that adds interest to the account. Write a tester/driver program that constructs a savings account with an initial balance of $1,000 and interest rate 10%. Then apply the addInterest method five times and print the resulting balance.