Writing a book on how to evaluate performance evaluation for a company.

1. What are some of the influences and measures in a companies performance?
2. Explain the use of return on assets (ROA) and the price-to-earnings (PE) ratio in evaluating the performance of a company.
3. Explain how to calculate ROA and PE ratio and how market conditions can affect these metrics.
4. Share the difference of ROA and PE ratio for a company you are familiar with. and what does these metrics tell us about the financial health of the company?

Please reference and cite the answers appropriately.