F. Pierce uses the CAPM to estimate its cost of common equity, rs and at the time of the analaysis the risk-free rate is 6%, the market risk premium is 5%, and the company's tax rate is 30%. F. Pierce estimates that its beta now (which is "unlevered" because it currently has no debt) is 1.2. Based on this information, what is the firm's optimal capital structure, and what would be the weighted average cost of capital at the optimal capital structure? Do not round intermediate calculations. Round your answers to two decimal places