Calculate your company's prior year and current year: net profit margin, operating income margin and operating asset turnover.

please answer the following questions about amazon:

1. Calculate your company's prior year and current year: net profit margin, operating income margin and operating asset turnover.
2. Calculate your company's prior year and current year: return on operating assets and DuPont return on Operating assets.
3. Calculate your company's prior year and current year return on investment.
4. Calculate your company's prior year and current year return on common equity.
5. Based on your calculations in parts 1 - 4, how would you evaluate the company's profitability performance over the last year? Explain.