Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the following table. Bond Coupon Rate Price Quote Maturity Face Value 1 6.5 % 106.36 5 years $ 45,000,000 2 8.0 115.02 8 years 40,000,000 3 7.7 113.57 15.5 years 60,000,000 4 7.3 102.81 25 years 55,000,000 If the corporate tax rate is 30 percent, what is the aftertax cost of Yings debt