payment amount. Complete parts (a) through (e) below. PMT=[1(1+nr)nt]P(nr) a. Find the required down payment. q b. Find the amount of the mortgage. q c. How much must be paid for the one point at closing? $[ (Round to the nearest dollar as needed.) d. Find the monthly payment (excluding escrowed taxes and insurance). $ (Round to the nearest dollar as needed.) e. Find the total cost of interest over 30 years. g (Round to the nearest dollar as needed.)