Calculate the IRR of a project that requires an initial cash outflow of $5,000 and will be sold at the end of year 5 for $2,500. The project produces the following cash flows: year 1) +$700; year 2) +$600; year 3) +$500; year 4) +$400; year 5) +300.

Please help me figure out what financial function to use in excel and what to input, thank you!