I need help :(

(Calculating IRR, payback, and a missing cash flow) The Merriweather Printing Company is trying to decide on the merits of constructing a new publishing facility. The project is expected to provide a series of positive cash flows for each of the next four years. The estimated cash flows associated with this project are as follows: (Click on the icon in order to copy its contents into a spreadsheet.) If you know that the project has a regular payback of 3 years, what is the project's IRR? The IRR of the project is %. (Round to two decimal places.)