Hi, could you please help me with this question about finding nash equilibria? Thank you!

5. The set of players is N. Each player i chooses an action a; E {0, 1}. Let N(a; 1) C N (resp., N(a; 0) CN) denote the set of players choosing 1 (resp., 0) given the action profile a = (a1, a2, . . .).(a) Suppose player i's payoff from taking action a; is as follows: wai, a-i) if N(a; a; ) is finite, -1 otherwise. What are the Nash equilibria of this game? (b) Suppose player i's payoff from taking action a; is as follows: wi (a;, a_i) -1 if N(a; a;) is finite, 1 otherwise. What are the Nash equilibria of this game