Your company has issued debt with a market value of $2.1 million, preferred shares with a market value of $2.7 million and equity with a market value of $17 million. Expected returns on these financings are, respectively, 8%, 6% and 12%. The company's income tax rate is 30%. What is the company's weighted average cost of capital? Select one: a. 12.00% b. 10.64% c. 9.75% d. 11.73%