Selected data from GMC Corporation are presented below: Total assets $2,200,000 Average assets 1,600,000 Net income 350,000 Net sales 1.200,000 Average common stockholders' equity 800.000 Instructions: Calculate the profitability ratios that can be computed from the above information. You must show your calculations to receive credit. If you just give a final answer with no calculations, you were receive a zero regardless if the answer is correct: 1. Profit margin 2. Asset turnover 3. Return on assets 4. Return on common stockholders' equity