Initial Investment (€)	Year 1 (€)	Year 2 (€)	Year 3 (€)	Year 4 (€)	Year 5 (€)
10,000	3,000	3,500	2,000	2,500	2,000
12,000	4,000	4,500	3,000	3,500	3,000
15,000	5,000	5,500	4,000	4,500	4,000

Requirements:

1. Calculate the Payback Period for each project.
2. Determine the NPV using a discount rate of 7%.
3. Evaluate the IRR for each project.
4. Assess which project is the best investment based on NPV and IRR.
5. Perform a sensitivity analysis on the NPV with discount rates of 5%, 7%, and 9%.