A five-year project requires an investment of -177 and has the following cash flows in years 1 through 5, respectively (all cash flows in dollars): 116, -109, 267, 2, and 108. Without actually calculating any IRR, what is the maximum possible value any of the real IRRs could have? Give your answer as a percent with two decimals; e.g., 23.24

The answer is 150.85. I would like to understand why.

Thanks!