A project manager is working on justification of a project. Since very little information is known about the project, some rough estimates have been gathered. Following table is prepared to show the cash inflow and outflow for the following five years: Year Cash In Flow Cash Out Flow 0 0 800,000 1 300,000 100,000 2 400,000 100,000 3 500,000 50,000 4 500,000 0 What is the payback period for this project