Question: Ben is a 22 year old senior who used the subsidized loan program to borrow $4,000 four years ago when interest rates were 4.06% per year. $5,000 was borrowed three years ago at 3.42%. Two years ago she borrowed $6,000 at 5.23%, and last year $7,000 was borrowed at 6.03% per year. Now he would like to consolidate her debt into a single 20 year loan with a 5% fixed annual interest rate. If Ben makes annual payments (starting in one year) to repay her total debt, what is the amount of each payment?