Caiculate the Macaulay duration of an 8%,31,000 par bond that matures in three years of the bond's YmM is 12% and intorest is paid semiannually. a. Colculate this bond's modified duration, Do hot round intermediate calculations. Round your answer to two decimal places. vesers b. Aswuming the tond r YTM goes from 12% ta 10.5%, caiculate an estimate of the price change. De not round intermediate calculations. Round rour anvaer to three decimal piaces, Use a minus sign to enter negative value, if any