Country Cook's Cost of Equity Is 16

Country Cook's cost of equity is 16.2 percent and its aftertax cost of debt is 5.8 percent.What is the firm's weighted average cost of capital if its debt-equity ratio is .42 and the tax rate is 34 percent?

A) 12.54 percent
B) 11.47 percent
C) 13.12 percent
D) 12.28 percent
E) 13.01 percent