Suppose a linear probability model you have developed finds there are two factors influencing the past bankruptcy behavior of firms: the debt ratio and the profit margin. Based on past bankruptcy experience, the linear probability model is estimated as: PDi = 0.20 (debt ratio) + 0.50 (profit margin) You know a particular firm has a debt ratio of 60 percent and a probability of default of 15 percent. Calculate the firm's profit margin. Options: 6.00 percent 12.00 percent 19.50 percent 15.00 percent