Vandenberg Corp. is trying to establish its optimal capital structure. Its current capital structure consists of 20% debt and 80% equity; however, the CEO believes the firm should use more debt. The risk-free rate, rre, is 3%, the market risk premium, RPM, is 6%, and the firm's tax rate is 25%. Currently, the firm's cost of equity is 10.20%, which is determined by the CAPM. What would be the firm's estimated cost of equity if it changed its capital structure to 30% debt and 70% equity? O 9.75% 10.66% 11.01% 11.57% 12.20%