Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the table below. Bond Coupon Rate 1 8.50% 2 7.00 3 8.20 4 8.70 Price Quote 106.5 93.9 105.3 95.1 Maturity 5 years 8 years 15.5 years 25 years Face Value $24,000,000 34,000,000 39,000,000 54,000,000 If the corporate tax rate is 25 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.) Aftertax cost of debt %