w OU ROLU. Bonds with face value of $1,000 pay a 10% coupon, mature in 20 years, and sell for $849.54. The company stock beta is 1.2. Risk-free rate is 10%, and market risk premium is 5% The company is a constant-growth firm that just paid a dividend of S2, sells for $27 per share, and has a growth rate of 8% The company's marginal tax rate is 40%. What is the company's after-tax cost of debt? OAK OB 7.2% Oc 12% D. 5.4%