The Fritzes are buying a house that sells for $117,000. The bank is requiring a minimum down payment of 15%. To obtain a 20-year mortgage at 7.5% interest, they must pay 4 points at the time of closing. a) Determine the required down payment. b) Determine the amount of the mortgage on the property with the 15% down payment. c) Find the cost of 4 points on the mortgage. a) The required down payment is $ b) The mortgage on the property is $ c) The cost of the 4 points on the mortgage is $ (Round to the nearest dollar as needed.)