Concerning financial performance analysis, which of the following are true?

Select ALL correct options

1. An increase in the Income Tax rate for a firm would have a positive impact on its Gross Margin.
2. Inventory turnover is a ratio that tells how well a firm is using its assets to drive revenue from a supply chain perspective.
3. For executives, Return on Equity (ROE) is the most important metric when analyzing the overall financial performance of a firm.
4. Firms should include Retained Earnings in the denominator when calculating Return on Invested Capital (ROIC).
5. An increase in the Interest Expenses for a firm would have a negative impact on its Net Margin.
6. None of the above.