i have not understand this topic and i dont know how to do! please can you explain me how to get the results?

Cash inflow from Project 1 and 2 Project 1 . Year 0 Year 1 (90,000) 20,000 Project 2 (110,000) 10,000 Year 2 30,000 20,000 Year 3 40,000 40,000 Year 4 20,000 60,000 Year 5 20,000 50,000 Calculate which one should be selected using Payback Method