Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Bond Coupon Price Quote Maturity 6 years 9 years 16.5 years 26 years Face Value Rate 5.4% 7.0 6.9 6.2 105.16 113.92 112.47 $56,000,000 51,000,000 71,000,000 78,000,000 2 3 4 71 101.71 If the corporate tax rate is 21 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.) Answer is complete but not entirely correct. Cost of debt 4.00 x%