(2 points) Mr. Smith is purchasing a $100000 house. The down payment is 20% of the price of the house. He is given the choice of two mortgages: a) a 20-year mortgage at a rate of 6%, compounded monthly. Find (i) the monthly payment: $ (ii) the total amount of interest paid: $ b) a 15-year mortgage at a rate of 6%, compounded monthly. Find (1) The monthly payment: $ (ii) the total amount of interest paid: $