Ivanhoe has determined that it could issue $1200 face value bonds with an 10 percent coupon paid semiannually and a 5-year maturity at $1117.58 per bond. If Ivanhoe's marginal tax rate is 39 percent, its after-tax cost of debt is closest to: O 6.9 percent. O 7.2 percent O 7.5 percent O 6.8 percent