A homeowner is purchasing a home for $140,000. The down payment will be 20% of the price, and the remainder will be financed with a 30-year mortgage at an interest rate of 6% compounded monthly. (a) What will the monthly payments be? (b) If the loan was instead for only 15 years, what would the monthly payments be? (c) How much interest would be paid for each of the two repayment periods?