Phil's Carvings, Inc. wants to have a weighted average cost of capital of 9.5 percent. The firm has an aftertax cost of debt of 6.5 percent and a cost of equity of 12.75 percent. What debt-equity ratio is needed for the firm to achieve their targeted weighted average cost of capital?

a. .67

b. .84

c. .92

d. .76

e. 1.08