The correct answer is: NPV = 0.959

How do I arrive at this result??

19. You are in a two-period world where a risk-free and risky asset are traded, see the figure below for the prices and payoffs. You have a project that costs 2 at time zero and pays 4 in the up and then up state, 3 in the up and then down state, 2 in the down and then up state, and 1 in the down and then down state. What is the NPV of this project