A corporation has a corporate tax rate of 35%. Please calculate their after tax cost of debt expressed as a percentage. The Corporation has several outstanding bond issues all of which require semi annual interest payments. Bond A has a coupon rate of 4.0%; a price quote 110; maturity is 6 years; and the face value is $100,000. Bond B has a coupon rate of 6.5%; a price quote of 120; maturity is 9 years; and the face value is $30,000. Bond C has a coupon rate of 9.2%; a price quote of 95; maturity is 16 years; and the face value $60,000. Bond D has a coupon rate of 9.9%; a price quote of 115; maturity is 24 years; and the face value is $50,000.