Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the table below. Bond 1 Coupon Rate 8.50% Price Quote 106.5 Maturity Face Value $ 5 years 8 years 15.5 years 25 years 24,000,000 34,000,000 39,000,000 54,000,000 2 3 4 7.00 8.20 8.70 93.9 105.3 95.1 If the corporate tax rate is 25 percent, what is the aftertax cost of the company's debt? Note: 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 5.37 %