Risk analysis Green Energy is considering expanding its investment in renewable energy generation. Two possible types, wind and solar, of energy generation are under review. After investigating the possible outcomes, the company made the estimates shown in the following table: $.$ The pessimistic and optimistic outcomes occur with a probablity of $25\%,$ and the most likely outcome occurs with a probability of $50\%.$

a$.$ Determine the range of the rates of return for each of the two projects.

b$.$ Which project is less risky?

c$.$ If you were making the investment decision, which one would you choose? What does this imply about your feelings toward risk?

d$.$ Assume that solar farm's most likely outcome is $18\%$ per year and that all other facts remain the same. Does this change your answer to part c$?$