You plan to purchase an $140,000 house using a 30-year mortgage obtained from your local bank. The mortgage rate offered to you is 4 percent. You will make a down payment of 10 percent of the purchase price. a. Calculate your monthly payments on this mortgage. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16)) Monthly payment $ b. Calculate the amount of interest and, separately, principal paid in the 230th payment. (Do not round intermediate calculations. Round your answers to 2 decimal places. (e.g., 32.16)) Amount of interest $ Amount of principal $ c. Calculate the amount of interest and, separately, principal paid in the 260th payment. (Do not round intermediate calculations. Round your answers to 2 decimal places. (e.g., 32.16)) Amount of interest $ Amount of principal $ d. Calculate the amount of interest paid over the life of this mortgage. (Do not round intermediate calculations. Round your answer to 2 decimal places. (e.g., 32.16)) Amount of interest paid.