Which of the following are likely relative cost of capital for a firm

Firm	Cost of Debt	Cost of Preferred Stock	Cost of equity
L	5%	8%	6%
T	3%	5%	8%
Z	8%	8%	8%
S	10%	8%	6%

1) Firm L

2) Firm Z

3) Firm S

4) Firm T

5) Not enough info