The bond J is a bond with a coupon rate of $4\%.$ The bond K is a bond with a coupon rate of $10\%.$ Both bonds have a maturity of $8$ years, make semi$-$annual payments, and have a yield to maturity of $9\%.$ If interest rates suddenly increase by $2\%,$ what is the percentage change in the price of these bonds? And if the rates suddenly decrease by $2\%?$ What does this problem teach you about the interest rate risk of low$-$coupon bonds? $(5$ Points$)$