A firm has a cost of equity of 13%, a cost of preferred of 11%, an after-tax cost of debt of 5.2% and a tax rate of 35%. Given this, which one of the following will increase the firm's weighted average cost of capital? a. Redeeming shares of common share ob. Increasing the firm's tax rate Oc. Increasing the firm's beta The cost of capital for a project should: a. be adjusted based on the risk of the project. O b.be adjusted based on the size of the project. O c.meet or exceed the internal rate of return of the project. O d. never exceed the cost of capital for the overall firm.