Oxygen Optimization is evaluating a project that would cost 84,000 dollars today. The project is expected to have the following other cash flows: 21,100 dollars in 1 year, 21,000 dollars in 2 years, 217,904 dollars in 3 years, and 9,900 dollars in 4 years. The cost of capital of the project is 7.17 percent. What is the discounted payback period for the project? Round your answer to 2 decimal places (for example, 2.89, 14.70, or 6.00).