A family has a $106,621 30-year mortgage at 6.6% 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...

A family has a $106,621 30-year mortgage at 6.6% 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

Show equations and provide explanation for each variable. Show all calculation work afterwards.