Two people, 1 and 2, are engaged in a joint project. Person πβ{1,2} puts in effort π₯π (0β€ π₯π β€ 1), and incurs cost πΆπ (π₯π ) = π₯π . The monetary outcome of the project is 4π₯1π₯2 which is split equally between them. Considering the situation as a strategic game, the set of all Nash Equilibria in pure strategies is