A company has the following information regarding the cost of capital:

Common Stock: $10/share with 3,000 shares outstanding, cost of equity is 6%;

Preferred Stock: 5% preferred stock selling at par, with $5,000 market value;

Debt: pre-tax cost of debt is 4%, tax rate is 21%. $50,000 market value.

What is the firm's weighted average cost of capital?

6.04%

5.23%

4.27%

3.66%