Need help with this one

The current interest rate on new debt is 10%; Foust's marginal tax rate is 25%; and its target capital structure is 50% debt and 50% equity. a. Calculate Foust's after-tax cost of debt. Round your answer to two decimal places. % Calculate Foust's cost of common equity. Calculate the cost of equity as rs=D1/P0+g. Do not round intermediate calculations. Round your answer to two decimal places. % b. Find Foust's WACC. Do not round intermediate calculations. Round your answer to two decimal places. %