Help with A, B, C please, thank you

Consider a retailing firm with a net profit margin of 3.5%, a total asset turnover of 1.80, total assets of $44.0 million, and a book value of equity of $18.0 million. a. What is the firm's current ROE? b. If the firm increased its net profit margin to 4.0%, what would be its ROE? c. If, in addition, the firm increased its revenues by 20% (while maintaining this higher profit margin and without changing its assets or liabilities), what would be its ROE? a. What is the firm's current ROE? The ROE using the DuPont Identity is \%. (Round to one decimal place.)