Ying Import has several bond issues outstanding, each making semiannual interest payments. The bonds are listed in the table below.

If the corporate tax rate is 34 percent, what is the aftertax cost of the companys debt?

bond	coupon rate	maturity	face value	price quote
1	6.5	5years	$30,000,000	105.0
2	5.3	8	50,000,000	95.4
3	6.9	15.5 years	65,000,000	103.8
4	7.3	25 years	85,000,000	105.7