13. What financial variable is > 0 in the common stock valuation model but is = 0 in the preferred stock valuation model? 14. What is the relationship between the current ratio and the quick ratio of inventory is equal to zero? 15. Consider the following data: dividends per share, $1; stock price per share, $45; retained earnings per share, $2. Calculate the price-earnings ratio. 16. The yield to maturity on a bond is 5%. In order for an investor to earn exactly 5%, what action must be taken by the bondholder when each coupon payment is received