is there a formula? i can't remember it

a. Calculate the IRR for each of the projects. Assess the acceptability of each project on the basis of the IRR b. Which project is preferred? a. The internal rate of return (IRR) of project X is %. (Round to two decimal places.) Data tabe (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.) Project X Project Y Initial investment (CF.) $500,000 $310,000 Year (1) Cash inflows (CF) 1 $140,000 $140,000 2 $160,000 $110,000 3 $160,000 $85,000 4 $180,000 $80,000 5 $240,000 $50,000 on WN