state true or false and briefly explain your answer

5. Firms that do not pay any dividends cannot be valued using dividend discount model but can be valued using residual income model. 6. A company's cost of debt is the contracted rate that it pays on its outstanding debt. 7. Enterprise value (EV) to EBITDA ratio is better than price to earnings ratio for relative valuation. 8. Price to EBITDA ratio should not be used for relative valuation