Suppose Dell Inc is currently has a debt to equity ratio of 1:2. The cost of debt is 5%, the cost of equity is 16%, and the tax rate is 20%.

a) What is the WACC for Dell? (Hint: For D/E ratio of 1:2, you can assume MVD = 1 and MVE = 2 to do this calculation.)

b) If Dell had no debt and was 100% equity financed, what would the cost of equity (r_e)? (Answer in %. Ex for .6789 put 67.89%)

c) Suppose Dell wants to change its capital structure and move to a debt to equity ratio of 1:3. If the cost of debt remains the same, what is the new cost of equity for Dell? (Answer in %. Ex for .6789 put 67.89%)