A 6-year car loan charges flat rate at 2.5% per annum, to be repaid by a monthly annuity-due. Calculate the ENR in monthly rest of the loan. If the borrower decides to redeem early after 12, 24, 36, 48 and 60 payments, calculate the ENR in monthly rest charged over these periods.

If you could just shopw me how to solve for one of the enr for the monthly rates if they redeemed them earlier that would be great thank you.