(1 point) Fifteen years ago a couple purchased a house for $120,000.00 by paying a 20% down payment and financing the remaining balance with a 30-year mortgage at 7.28% compounded monthly. (a) Find the monthly payment for this loan Monthly Payment (Note: Your answer should include a dollar sign and be accurate to two decimal places) (b) Find the balance of the loan after 18 years and after 19 years? Let n be how many payments are left on the loan. After 18 years Loan Balance: After 19 years 11 ==> Loan Balance: (Note: The balance amounts should include a dollar sign and be accurate to two decimal places) (c) Find the total amount of interest paid by the couple during the 19th year Interest Paid During 19th year (Note: Your answer should include a dollar sign and be accurate to two decimal places)