A firm with a 70% debt to equity ratio and a beta of 1 46 has determined that its cost of equity is too high. In order to lower the cost of equity by 1 05%, what would its debt to equity ratio have to be? Assumptions the risk-free rate is 5.25%; the risk premium is 6.75%; the tax rate is 34%; and the firm's unlevered beta is 1.00. a) 15.11% b) 14.06% c) 46.13% d) 89.53%