Chandler and Monica Bing wish to buy a new home. The listing price is $387,500 and they plan to put 20% down. New Rochelle Savings and Loan will lend them the remainder at a 9% fixed APR for 30 years, with monthly payments to begin in one month. For simplicity, lets ignore closing costs and taxes when solving this question. a). How much will their monthly payments be? b). Suppose Chandler and Monica want to pay off the loan in 15 years. How much extra must they pay each month to do so, if the APR remains at 9% and there is no early payment penalty?