Swift Stairs Inc is considering investing in a new machine. The cost of the investment is $200,000. The net cash flows resulting from the investment are as follows: Year 1: $10,000; Year 2: $50,000; Year 3: $110,000; Year 4: $90,000; Year 5: $50,000; Year 6: $200,000. Compute the payback period for this project. 4.00 6.00 3.33 2.50