A firm's optimal capital structure is 45% debt, 10% preferred stock, and 45% common equity. The firm's tax rate is 43%. The beta coefficient of the firm's debt is 0.2, the risk-free rate of interest is 2.7% and the market risk premium (RM-Rp) is 7.3%. The firm's preferred stock currently has a price of $84 and it carries a dividend of $10 per share. Currently, the price of a share of common equity was $29 per share. The last dividend payment is $2.52. Dividends are expected to grow at a rate of 4 percent for the future. What is this firm's weighted average cost of capital? Select the best answer. 00 percent 5 percent 10 percent 15 percent