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(a) What is the approximate percent drop in the price of a bond whose modified duration is 3.25 years when the yield increases by 2%? (b) A bond is trading at a price of P100 with a YTM of 5% compounded semiannually. If the yield increases by 1 basis point, the price of the bond will decrease to 199.94 (using a first-order approximation). What is the Macaulay duration of the bond? (c) A par bond with principal P1,000 has a modified duration of 1.5 years and convexity of 20. If the bond's YTM decreases by 10 bps, use a second-order approximation to estimate the peso price change in the bond. (d) The BPV of a bond is P0.50. Approximate the absolute value of the peso price change in the bond corresponding to a 15 basis point change in the yield