4. Consider a project with the following cash flows: Cash Flows ($) C1 200 CO -100 C2 -75 a. Write down the equation defining a project's IRR. In practice how is IRR calculated? b. How many internal rates of return does this project have? c. What of the following numbers is the project IRR: -50%, -12%, 5% or 50%? d. The opportunity cost of capital is 20%. Is this an attractive project? Briefly explain