GHI Corp. is assessing two projects, Project E and Project F. Each project requires an initial investment of $180,000. The company uses a discount rate of 14%. The following table shows the projected net cash flows:

Projected Net Cash Flows (in $):

Year	Project E	Project F
0	(180,000)	(180,000)
1	50,000	60,000
2	60,000	70,000
3	70,000	80,000
4	80,000	90,000

Requirements:

1. Calculate the payback period for each project.
2. Determine the NPV for both projects.
3. Compute the IRR for each project.
4. Compare the profitability index for the two projects.
5. Recommend the best project based on financial metrics.