Bond J is a $3\mathrm{.}9\%$ coupon bond. Bond K is a $9\mathrm{.}9\%$ coupon bond. Both bonds have $15$ years to maturity, make semiannual payments and have a YTM of $6\mathrm{.}9\%.($Do not round intermediate calculations. Negative answers should be indicated by a minus sign. Round the final answers to $2$ decimal places.$)$

If interest rates suddenly rise by $2\%,$ what is the percentage price change of these bonds?

Percentage change in price of Bond J $\%$

Percentage change in price of Bond K $\%$

What if rates suddenly fall by $2\%$ instead?

Percentage change in price of Bond J $\%$

Percentage change in price of Bond K $\%$