please help, thank you!

A firm wants a sustainable growth rate of 2.78 percent while maintaining a dividend payout ratio of 20 percent and a profit margin of 4 percent. The firm has asset turnover of 0.5 What is the debt-equity ratio that is required to achieve the firm's desired rate of growth? (calculate ROE, and then use Du Pont analysis to calculate equity multiplier Equity multiplier is equal to 1-D/E]