Consider a retail firm with a net profit margin of 3.37%; a total asset turnover of 1.84 ; total assets of $43.9million; and book value of equity of $17.8 million a. what is the firms' ROE? b. if the firms increased its net profit margin to 4.25%, what would its ROE be? c. if, in addition, the firm increased its revenues by 16% (maintaining this higher profit margin and without changing its assets or liabilities). what would be its ROE