great lakes packing has two bond issues outstanding. the first issue has a coupon rate of 3.64 percent, a par value of 2000 per bond, matures in 3 years, has a total face value of 4.3 million and is quoted at 102 percent of face value. the second issue has a coupon rate of 6.41 percent, a par value of 1000 per bond, matures in 23 years, has a total face value of 8.6 million and is quoted at 92 percent of face value. both bonds pay interest semiannually. the company's tax rate is 35 percent. what is the firms weighted average aftertax cost of debt