how do you do these two?

(1 point) Fifteen years ago a couple purchased a house for $100,000.00 by paying a 20% down payment and financing the remaining balance with a 30-year mortgage at 4.16% compounded monthly. (a) Find the monthly payment for this loan. Monthly Payment: $ (b) Find the balance of the loan after 17 years and after 18 years. Let m be how many payments are left on the loan. (c) Find the total amount of interest paid by the couple during the 18th year. Interest Paid During 18th year: $ Note: You can earn partial credit on this problem. (1 point) If you want to be paid from a 14 year ordinary annuity with a guaranteed rate of 7.03% compounded annually, how much should you pay for one of these annuities if you want to receive annual payments of $10,000.00 over the 14 year period