Rose and George are purchasing a house for $450,000. Their bank requires them to pay a down payment of 20%. The current mortgage rate is 10%, and they are required to pay 1 point at the time of closing. Determine the total amount Rose and George will pay for their house, including principal, interest, down payment, and points (do not include taxes and homeowners’ insurance) if the length of their mortgage is

(a) 10 years.

(b) 20 years.

(c) 30 years