Q$4.$ Define classes and use objects in a test program $(6$ marks$)$

Consider a banking system where each account has a balance and an account number. Define a class called

BankAccount that represents a bank account with the following UML:

Attributes descriptions:

account$\_$number: client bank account number.

balance: the current balance of the account.

last$\_$transaction$\_$type: the type of the last transaction $("$Deposit$"$ or "Withdraw"$).$ It is $"-$ by default.

last$\_$transaction$\_$amount: the amount of the last transaction.

accounts$\_$count: static variable counts the number of accounts in the bank. The default value is $0.$

total$\_$balances: static variable defines the current balances of all accounts. The default value is

$10,000,000.$

$3-$ In the Main Class $[2$ pt$]$;

a$.$ Create $2$ objects of BankAccount Class: $3000$ AFD for the first, $10000$ AFD for the second. Sugest

your own values for account$\_$number.

b$.$ Withdraw $6000$ AED from the first account, and $5000$ AED from the second account.

c$.$ Print the account number, the balance and the last transaction of the first account.

d$.$ Print the number of accounts in the bank and the total balances.