John Fare purchased $10,000 worth of equipment by making a $2000 down payment and promising to pay

Question:

John Fare purchased $10,000 worth of equipment by making a $2000 down payment and promising to pay the remainder of the cost in semiannual payments over the next 4 years. The interest rate on the debt is 10%, compounded semiannually?
(a) The size of each payment.
(b) The total amount paid for each purchase.
(c) The total interest paid over the life of the loan.