9. Monthly payments are to be made against an $850,000 loan at 7.15% compounded annually with a 15-year amortization. a. What is the size of the monthly payment? b. Calculate the principal portion of the 100th payment. c. Calculate the interest portion of the 50th payment. d. Calculate how much the principal will be reduced in the second year. e. Calculate the total interest paid in the fifth year. You MUST use the TI BA II calculator features (N, I/Y, PV, PMT, FV, AMORT) to solve questions whenever possible.