Jack's Construction Co. has 80 bonds outstanding that are selling at their par value of $1,000 each. Bonds with similar characteristics are yielding a pretax 8.6 percent. The firm also has 4,000 shares of common stock outstanding. The stock has a beta of 1.1 and sells for $40 a share. The U.S. T-bill is yielding 4 percent, the market risk premium is 8 percent, and the firm's tax rate is 21 percent. What is the firm's Weighted Average Cost of Capital?