Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Bond Price Quote Maturity Face Value 1 Coupon Rate 5.3% 6.9 6.8 2 105.06 113.82 112.37 101.61 5 years 8 years 15.5 years 25 years $ 57,000,000 52,000,000 72,000,000 79,000,000 3 4 6.1 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 %