Use the table below to answer quesitons a) through ( f ) d) Compute the approximate(effective) Duration using the shortcut formula by changing the yeilds by 20 Basis points and compare your answer to part C above ( 1 mark) e) Compute the approximate convexity measure for Bonds A and B by changing yeild by 20 Basis Point. (1 mark) f) Without working through calculations, indicate whether the Duration of the two bonds would be higher or lower if the yeild to maturity is 10% rather than 8% ( 1 mark)