4. (15) Organic Produce Corporation has 7.9 million shares of common stock outstanding, 540,000 shares of 7.4 percent preferred stock outstanding, and 179,000 of 8.6 percent semiannual bonds outstanding. The face (par) values of each preferred stock and bond are $100 and $1,000, respectively. The common stock currently sells for $64.40 per share and has a beta of 1.24, the preferred stock currently sells for $107.60 per share, and the bonds have 13 years to maturity and sell for 94 percent of par offering a yield to maturity of 9.41 percent. The market risk premium is 7 percent, T-bills are yielding 5.7 percent, and the firm's tax rate is 35 percent. What is the firm's weighted average cost of capital