Use PMT = to determine the regular payment amount, rounded to the nearest cent. The cost of a home is financed with a $180,000 20-year - nt fixed-rate mortgage at 4.5%. a. Find the monthly payments and the total interest for the loan. b. Prepare a loan amortization schedule for the first three months of the mortgage. a. The monthly payment is $ 1,138.77 . (Do not round until the final answer. Then round to the nearest cent as needed.) The total interest for the loan is $ 93,304.53. (Use the answer from part a to find this answer. Round to the nearest cent as needed.) b. Fill out the loan amortization schedule for the first three months of the mortgage below. Payment Number Principal 1 $ Interest Loan Balance $ 2 $ $ $ 3 $ (Use the answer from part a to find these answers. Round to the nearest cent as needed.)