A local appliances company generated a sales revenue of $15,000,000 and net income of $800,000 in the past fiscal year. Its total assets are $10,500,000, and stockholders' equity is $3,500,000.

a) What is the net profit margin?

b) What is the return on assets (ROA)?

c) What is the return on equity (ROE)?

d) The total debt ratio is currently 66.67%. If the net income and total assets stay the same, but new shares are issued to pay off the debt, and the total debt ratio decreases to 50%, what would the return on equity be now?