The market value of Fords' equity, preferred stock, and debt are $6 billion, $2 billion, and $13 billion, respectively. Ford has a beta of 1.3, the market risk premium is 7%, and the risk-free rate of interest is 5%. Ford's preferred stock pays a dividend of $4 each year and trades at a price of $28 per share. Ford's debt trades with a yield to maturity of 8.5%. What is Ford's weighted average cost of capital if its tax rate is 25%