research Southwest Airlines financial reports and fill in the following ratios/formulas (be sure to show work)

1. net profit margin = profit after taxes/sales 2. current ratio = current assets/current liabilities 3. debt to assets = total debt/total assets 4. fixed assets turnover = sales / fixed assets 5. dividend yield on common stock = annual dividend per share/ current market price per share

In 200 words which ratio provides the most key insights into the firm's current level of performance? how can you assess whether the results of your calculations are positive or negative? explain which of the ratios give you reason to be concerned with the organizations current strategy and why?