a)What is the monthly scheduled payment of a 9% interest, fixed rate, fully amortizing 15-year loan, with original principal amount of 80,000

b)Three years have passed since the bank that you work for has invested in the loan in item (a), and now it is time for the borrower to send the 36^thmonthly payment to the bank. Instead of sending the regular payment, the borrower has decided to pay the loan off. The caveat is that this loan has had a constant prepayment rate (CPR) of 6% for the last three years. What is the amount that the borrower owes to the bank now?