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%	106.46	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	67,000,000

If the corporate tax rate is 25 percent, what is the aftertax cost of the companys debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

I got 4.69% but it was not correct. Please help.