6. Which operations below can help a firm reduce leverage? a. Issue more equity. b. Buy back equity. c. Issue more debt. d. Take a less risky project. e. Increase dividend payments. 13. Suppose we are in the M&M world. For firm X, the cost of equity is 17%, the required return on the assets is 12%, and the debt to equity ratio is 1:2. What is the firm's cost of equity if the debt-to-equity ratio becomes 1:1 while assets are unchanged? a. 12% b. 17% c. 20% d. 22% e. 24%