15. Sea Oats Company has 10 million shares of common stock outstanding with a price of $25 per share. There are 2 million shares of preferred stock outstanding with a price of $50 per share. The company also has debt outstanding with a market value of $150 million. The required return on common stock is 15.4%. The required return on preferred stock is 11.5% and the before-tax required return on debt is 10%. If the tax rate is 30%, what is Sea Oat's WACC? O a. 10.28% O b. 10.92% O c. 12.10% O d. 12.91% O e. 14.09%