9-13 ant J. R. Smith plans to borrow $200,000 through a 30-year mortgage from his to buy a home. If the bank charges him an interest rate of 7 percent. find (a) Monthly mortgage payment. (b) Amortization schedule for the first 3 months: balance after each payment principal and interest portions of each payment. (c) For the first 221 payments, what is the total interest paid and the total principal (d) How much would J. R. increase his monthly payment if he reduced the loan period to 15 years, all other things constant? How much would J. R. save in total principal and interest