Kelsey planned to buy a house but could afford to pay only $12,500 at the end of every 6 months for a mortgage with an interest rate of 5.40% compounded semi-annually for 20 years. He paid $27,750 as a down payment. a. What was the maximum amount he could afford to pay for a house? Round to the nearest cent b. What was his total amount spent for the house through the mortgage period including the downpayment (not taking the time-value of money into account)? Round to the nearest cent c. What was the total amount of interest paid through the mortgage period