How do I calculate the higher and lower IRRs as well as the modified IRR?

Howell Petroleum, Inc., is trying to evaluate a generation project with the following cash flows. If the company requires a return of 2 percent on its investments, what is the project's NPV? What are the IRRs for the project? What is the Modified IRR of the project? Input area: (Use cells A6 to B9 from the given information to complete this question. You must use the built-in Excel function to answer this question. Use a "Guess" of 5 to calculate the higher IRR and -.99 to calculate the lower IRR.) Output area