please please solve both Questions in 30 minutes

QUESTION 23 Which of the following statements is FALSE? O a. A firm that raises all of its capital via equity is referred to as an unlevered firm. O b. WACC is the average of a firm's equity and debt cost of capital, weighted by their relative proportion. O c. A firm's cost of debt is the rate of interest it would have to pay to refinance its existing debt. O d. In WACC calculation, we determine the weights based on the book values of debt and equity. QUESTION 24 Which of the following statements is correct? O a) When calculating the WACC, it is a standard practice to subtract dividend and risk-free securities to compute the net debt outstanding. b) When corporate tax rates decline, the effective cost of debt increases. O c) A project's cost of capital does not depend on its risk. O d) The pre-tax cost of debt equals to the debt's coupon rate