Define a class for a bank account that includes the following data members:  Name of the depositor
 Account Number
 Type of account
 Balance amount in the account
The class also contains the following member functions:
 A constructor to assign initial values
 Deposit function to deposit some amount. It should accept the amount as
parameter.
 Withdraw function to withdraw an amount after checking the balance. It
should accept the amount as parameter.
 Display function to display name and balance.