Bond J has a coupon of 4.6 percent. Bond K has a coupon of 8.6 percent. Both bonds have 10 years to maturity and have a YTM of 7.2 percent.

a. If interest rates suddenly rise by 1.2 percent, what is the percentage price change of these bonds? (A negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)

b. If interest rates suddenly fall by 1.2 percent, what is the percentage price change of these bonds? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)