(a) What must be the same between two firms when conducting ratio analysis in order for observed differences to be driven by strategy or performance? Why? (b) What is common calculation of the denominator of ROE? Why? (c) How can profit margin reflect strategy? (d) How does strategy affect asset turnover? Generally and also between Dell and Compaq. (e) What role does leverage play in ROE? () Why are short-term and long term liquidity (solvency) important to analyze? (8) Does simply looking at the difference between two ratios tell the whole story? Why or why not