tCFt 4. Bo = 973.96 and -1(1+r)n = 10486.77 where r = 4.5%. The coupons are paid semi-annually. a. Find the duration for the bond. b. If the market rate of interest decreases to 4%, find the expected change in the bond's price using Duration. c. Compare the answer in (b) to the actual change in the bond's price if r decreases to 4%. Why are the two answers different?