Q. Lucky cement Co. is trying to establish its optimal capital structure. Its current capital structure consists of 30% debt and 70% equity; however, the CEO believes that the firm should use more debt. The risk-free rate, Rf, is 5%; the market risk premium, RPM, is 6%; and the firms tax rate is 40%. Currently, Luckys cost of equity is 14%, which is determined by the CAPM. 1. What would be Luckys estimated cost of equity if it changed its capital structure to 40% debt and 60% equity? 2. What would be Luckys estimated cost of equity if it changed its capital structure to 50% debt and 50% equity? 3. Based on cost of equity estimations, should the firm change its capital structure? if yes, which point is optimal if the target is to minimize the cost of equity of the firm?