The Nicols are buying a house selling for $335,000. They pay a down payment of $35,000 from the sale of their current house. To obtain a 15-year mortgage at a 4.5% interest rate, the Nicols must pay 3.5 points at the time of closing. a) What is the amount of the mortgage? b) What is the cost of the 3.5 points? a) The amount of the mortgage is $ b) The cost of the 3.5 points on the mortgage is $