You just now financed a house, and the mortgage is a 10-year, $200,000 mortgage, with a single payment made at the end of each year. The interest rate is 5%, which by my calculations is a payment at the end of each year of $25,900 (=$200,000/7.722). Suppose you immediately, having made no payments on the original mortgage, receive an offer to refinance at 4%. Suppose you can escape the 5% mortgage and accept the 4% mortgage. By how much will the payments fall if you accept the offer at 4%? Please work out if possible