Arden Corporation is considering an investment in a new project with an unlevered cost of capital of 8.7%. Arden's marginal corporate tax rate is 37%, and its debt cost of capital is 5.4%.

a. Suppose Arden adjusts its debt continuously to maintain a constant debt-equity ratio of 0.5. What is the appropriate WACC for the new project?

b. Suppose Arden adjusts its debt once per year to maintain a constant debt-equity ratio of 0.5. What is the appropriate WACC for the new project now?

c. Suppose the project has free cash flows of $9.6 million per year, which are expected to decline by 1.9% per year. What is the value of the project in parts (a) and (b) now?