Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Coupon Bond Rate Price Quote Maturity Face Value $ 1 5.8% 105.56 6 years 52,000,000 234 7.4 114.32 9 years 47,000,000 7.3 112.87 16.5 years 67,000,000 4 6.6 102.11 26 years 74,000,000 If the corporate tax rate is 22 percent, what is the aftertax cost of the company's debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Cost of debt %