Two bonds, both with 10 years to maturity, have the same yield to maturity (equal to 5%) but different coupon rates. Coupon payments are annual. Bond A has a Macaulay duration of 8.66 and bond B has a Macaulay duration of 7.05. (iii)If the yield to maturity of bond B was to decrease by 0.5%, what would be your estimate of the percentage change in its price? (iv) Explain whether the answer you arrived at in part (iii) is likely to be exact or an approximation. Use a diagram showing the relationship between prices and yields to support your arguments