These are the answers for 9.7 and 9.8, but I do not know how to calculate them. Can you please provide step by step calculation.

9.7 A five-year bond with a yield of 11% (continuously compounded) pays an 8% coupon at the end of each year. (a) What is the bond's price? (b) What is the bond's duration? (c) Use the duration to calculate the effect on the bond's price of a 0.2% decrease in its yield. (d) Recalculate the bond's price on the basis of a 10.8% per annum yield and verify that the result is in agreement with your answer to (c). 9.8 Repeat Problem 9.7 on the assumption that the yield is compounded annually. Use modified durations. 9.7 (a) The bond's price is 86.80 , (b) the bond's duration is 4.256 years, (c) the duration formula shows that when the yield decreases by 0.2% the bond's price increases by 0.74 , and (d) recomputing the bond's price with a yield of 10.8% gives a price of 87.54 , which is approximately consistent with (a) and (c). 9.8 (a) The bond's price is 88.91 , (b) the bond's modified duration is 3.843 years, (c) the duration formula shows that when the yield decreases by 0.2% the bond's price increases by 0.68 , and (d) recomputing the bond's price with a yield of 10.8% (annually compounded) gives a price of 89.60 , which is approximately consistent with (a) and (c)