$3.$ A firm is unlevered with an EBIT of $$2,000$ and a total equity of $$20,000.$ Assuming no taxes, what would be the firm$$s return on equity $($ROE$)?$ If the firm borrows debt and reaches a $40\%$ total debt ratio, what would be its levered ROE under a $6\%$ interest rate? If you invest $$100$ in the unlevered firm, to reach the levered ROE, what should you do$?$