A tamily has a $134,842,30-year mortgage at 7.2% compounded monthly. Find the monthly payment. Also find the unpaid balance after the following periods of time. (A) 10 years (B) 20 years (C) 25 years The monthly payment is $ (Round to the nearest cent as needed.) A tamily has a $134,842,30-year mortgage at 7.2% compounded monthly. Find the monthly payment. Also find the unpaid balance after the following periods of time. (A) 10 years (B) 20 years (C) 25 years The monthly payment is $ (Round to the nearest cent as needed.)