Use the formula for computing monthly payments on a mortgage to answer the question. Round your answers in (a)-(d) to two decimal places, if necessary. A house sells for $100,000 and a 9% down payment is made. A mortgage is secured at 5% for 20 years. Formula for Computing Monthly Payments on a Mortgage P R- - R=regular monthly payment P= amount financed, or principal rate written as a decimal number of payments per year number of years (a) Find the down payment. The down payment is $ 9000 Part 2 of 4 (b) Find the amount of the mortgage. The amount of the mortgage is $ 91,000 Part 3 of 4 (c) Find the monthly payment. Do not round any intermediate calculations, Round your final answer to two decimal places. The monthly payment is $ 600.56 Part: 3/4 Part 4 of 4 (d) Find the total interest paid. Use the answer from Part (c) in your calculation. Round your final answer to two decimal places. The total interest paid is s