Exercise

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 $o.$

total$\_$balances: static variable defines the current balances of all accounts.

The default value is $10,000,000.$