8. Indicate whether the following statements are true or falos: a. Longer-maturity bonds necessarily have longer durations. b. The longer a bond's duration, the lower its volatility. (Volatility = modified duration. ) c. Other things equal. the lower the bond coupon, the higher its volatility. d. If interest rates rice. bond durations rise also. 9. If a bond's volatility is 5.2 pereent and its sield to maturity changes by 0.5 pereent 4 remis price of the bond: a. changes by 5.2 pereent. b. changes by 2.6 percent. c. changes by 7.8 percent. d. will not change