Can someone show me the correct excel formula to answer this question?

18. Lodestone Mining has forecast the cash flows that would be generated by a new mine they are digging. Lodestone's required return on new mines is 15%. Based on the cash flow forecast below, how much should Lodestone be willing to invest in this mine? (Values are in millions) Year 2 3 4 5 Cash flow 0 5 8 5 1 Rate Periods Payment Future value Present value Note: you can sum the PV of each future cash flow, or you can use the net present value function in Excel