(1 point) Mr. Smith is purchasing a $140000 house. The down payment is 20% of the price of the house. He is given the choice of two mortgages: a) a 30 -year mortgage at a rate of 6%. Find (i) the monthly payment: $ (ii) the total amount of interest paid: $ b) a 15-year mortgage at a rate of 6%. Find (i) The monthly payment: \$ (ii) the total amount of interest paid: $