Green Energy Solutions is evaluating the viability of two new projects, Project Solar and Project Wind. The following table provides the expected cash flows:

Year	Project Solar	Project Wind
0	$(250)	$(300)
1	70	90
2	100	110
3	130	140
4	160	160

The company's discount rate is 9%. Your tasks are to:

a. Find the discounted payback period for each project. b. Calculate the NPV for both projects. c. Determine the IRR for each project. d. Analyze which project has the better payback period. e. Provide a recommendation on which project should be undertaken and justify your answer.