18. Interest Rate Risk (LO2) Bond J is a 3% coupon bond. Bond K is a 9% coupon bond. Both bonds have 15 years to maturity, make semiannual payments, and have a YTM of 6%. If interest rates 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? 20. Bond Yiclds (LO2) Airbutus Co. wants to issue new 20-jear bonds for some much-needed expansion projects. The company currently has $% coupon bonds on the market that sell for $930, make semiannual payments, and mature in 20 years. What coupon rate should the company set on its new bonds if it wants them to sell at par? 21. Accrued Interest (LO2) You purchase a bond with an involee price of $1.027. The bond has a coupon rate of 6.8%, and