Thurbinar has a stock price of $19 per share, with 16 million shares outstanding. It also has $107 million in outstanding debt, Thurbinar's equity beta is 1.00. The risk-free rate is 3%, and the marke risk premium is 4%. Assume Thurbinar's debt has a beta of zero. What is Thurbinar's unlevered cost of capital? Does your answer over or underestimate the true cost of capital? 5.96%; overestimate 8.60%; overestimate 5.96%; underestimate 9.60%; underestimate