you were hired as a consultant to Giambono Company, whose target capital structure is 40% debt, 15% preferred, and 45% common equity. The after-tax cost of debt is 6%, the cost of preferred is 7.50%, and the common stock has the following CAPM data: risk free rate of 5%, market risk premium of 6%, and beta 1.05. The firm will not be issuing any new stock. What is its WACC