Bond j is a $3\%$ coupon bond. Bond k is a $9\%$ coupon. Both bonds have $15$years to maturity, make semiannual payments and have a YTM of $6\%.$ If interest rate suddenly rise by$2\%,$ what is the percentage price change of these bonds? What if rates suddenly fall by $2\%$ instead? What does this problem tell you about the interest rate risk of lower coupon bonds? By using finanacial calculator approah, BA II Plus Texas instruments.