java program to Implement a class Account. An account has

a balance

functions to add

and withdraw money,

And a function to inquire the current balance.

Condition:

1. Pass a value into a constructor to set an initial balance.

2. If no value is passed the initial balance should be set to $0.

3. Charge a $5 penalty if an attempt is made to withdraw more money than available

in the account.

4. Enhance the Account class to compute interest on the current balance.