The problem describes a debt to be amortized. (Round your answers to the nearest cent.) A man buys a house for $390,000. He makes a $150,000 down payment and amortizes the rest of the purchase price with semiannual payments over the next 15 years. The interest rate on the debt is 8%, compounded semiannually. (a) Find the size of each payment. $ (b) Find the total amount paid for the purchase. $ (c) Find the total interest paid over the life of the loan.