Dickson, Inc., has a debt-equity ratio of 2.4. The firms weighted average cost of capital is 9 percent and its pretax cost of debt is 7 percent. The tax rate is 25 percent. a. What is the companys cost of equity capital? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the companys unlevered cost of equity capital? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. What would the companys weighted average cost of capital be if the company's debt-equity ratio were .70 and 1.40? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)