Al's Audio has a cost of debt of 5 percent, a cost of equity of 11 percent, and a cost of preferred stock of 9 percent. The weight for debt is 0.16, the weight for preferred shares is 0.34, and the weight for common stock is 0.5. The company's tax rate is 34 percent. What is the weighted average cost of capital for Al's Audio Shop? Select one: o a. 9.32 percent O b. 9.15 percent O c. 9.09 percent O d. 9.45 percent o e. 8.98 percent