Problem 7-18 Interest Rate Risk (LO2) Bond J is a 3.9% coupon bond. Bond K is a 9.9% coupon bond. Both bonds have 15 years to maturity, make semiannual payments and have a YTM of 6.9%. (Do not round intermediate calculations. Negative answers should be indicated by a minus sign. Round the finel answers to 2 decimat places.) If interest rates suddenly rise by 2%, what is the percentage price change of these bonds? What if rotes suddenly fall by 2% instead