Bond J has a coupon rate of $5\mathrm{.}6$ percent. Bond K has a coupon rate of $15\mathrm{.}6$ percent. Both bonds have nine years to maturity, a par value of $$1,000,$ and a YTM of $12\mathrm{.}2$ percent, and both make semiannual payments.

a$.$

If interest rates suddenly rise by $2$ percent, what is the percentage change in the price of these bonds? $($A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ If interest rates suddenly fall by $2$ percent instead, what is the percentage change in the price of these bonds? $($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$