jacob lends 8000 to jaron. jaron agrees to pay it back in 10 annual installments at 7% with the first payment due in one year. after making 4 payments, jaron renegotiates to payoff the debt with 4 additional annual payments. the new payments are calculated so that jacob will get a 6.5% annual yield over the entire 8-year period. determine how much interest jaron saved by renegotiating.