hamada equation: please help, thanks!

Situational Software Co. (SSC) 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, rMF, is 3%; the market risk premium, RPM, is 7%; and the firm's tax rate is 40%. Currently, SSCs cost of equlty is 16%, which is determined by the CAPM. The data has been collected in the Microsoft Excel Online fie below. Open the spreadsheet and perform the required analysis to answer the question below. Open spreadsheet What would be 55SC estimated cost of equity if it changed its capital structure to 50% debt and 50% equity? Round your answer to two decimai ploces. Do not round intermediate steps