Encik Azhar deposited RM500 every quarter for five years in an account that paid 3.85% interest compounded quarterly. He withdraws RM5000 at the end of the fifth year and the balance was left in that...

Encik Azhar deposited RM500 every quarter for five years in an account that paid 3.85% interest compounded quarterly. He withdraws RM5000 at the end of the fifth year and the balance was left in that account.
(a) Determine the amount accumulated at the end of five years.
(b) How much is the balance in the account at the end of eight years.
(c) Find the effective rate which is equivalent to the above nominal rate.