Consider a retail firm with a net profit margin of 3.17%, a total asset turnover of 1.84, total assets of $45.2 million, and a book value of equity of $18.4 million. a. What is the firm's current ROE? b. If the firm increased its net profit margin to 4.14%, what would be its ROE? C. If in addition, the firm increased its revenues by 17% maintaining this higher profit margin and without changing its assets or liabilities), what would be its ROE