risk premium is 4%. a. If your firm's project is all-equity financed, estimate its cost of capital. b. Assume Thurbinar's debt has a beta of zero. Estimate Thurbinar's unlevered beta. Use the unlevered beta and the CAPM to estimate Thurbinar's unlevered cost of capital. c. Estimate Thurbinar's equity cost of capital using the CAPM. Then assume its debt cost of capital equals its yield and using these results, estimate Thurbinar's unlevered cost of capital. d. Explain the difference between your estimate in part (b) and part (c). a. If your firm's project is all-equity financed, estimate its cost of capital. The project's cost of capital is \%. (Round to two decimal places.) b. Assume Thurbinar's debt has a beta of zero. Estimate Thurbinar's unlevered beta. Use the unlevered beta and the CAPM to estimate Thurbinar's unlevered cost of capital. Thurbinar's unlevered beta is (Round to two decimal places.) Thurbinar's unlevered cost of capital is \%. (Round to two decimal places.) c. Estimate Thurbinar's equity cost of capital using the CAPM. Then assume its debt cost of capital equals its yield and using these results, estimate Thurbinar's unlevered cost of capital. Thurbinar's equity cost of capital is 1%. (Round to two decimal places.) Thurbinar's unlevered cost of capital is \%. (Round to two decimal places.) d. Explain the difference between your estimate in part (b) and part (c). (Select the best choice below.) A. The answers differ because we are using approximations rather than formulas that hold exactly. C. The answers are actually the same; any difference is just due to rounding errors. D. We should have gotten the same answer, the problem is the numbers in the problem are not consistent. The average unlevered cost of capital from part (b) and part (c) is 10. (Round to two decimal places.) The average unlevered cost of capital from part (b) and part (c) with part (a) is \%. (Round to two decimal places.)