URGENT!!

b) Assume that there are two available bonds to buy. Bond A has a maturity of 4 years, a coupon rate of 8% a yield to maturity of 6%, a face value of 1000, and it pays annual coupons. Bond B is a zero-coupon bond with a maturity of 4 years, yield to maturity of 6% and face value of 1000. i) Calculate the Macaulay duration for both bonds. (10 marks) ii) Based on duration, which bonds price has a higher sensitivity to changes in the interest rates? (5 marks) iii) Assume that yields to maturity increase by 2% for both bonds. Calculate their percentage price change as a result of the increase in the yields, using duration. (5 marks) iv) How accurate was the estimated price change using duration? Explain your answer. (max 50 words)