Hello, can you help me with the following exercise?

53.A firm wants a sustainable growth rate of 2.68 percent while maintaining a 40 percent dividend payout ratio and a 6 percent profit margin. The firm has a capital intensity ratio of 2. What is the debt-equity ratio that is required to achieve the firm's desired rate of growth?

a..42

b..45

c..49

d..52

e..54