If this is a two-player simultaneous-move game with normal form:

 

Which are all the Nash equilibria in pure and mixed strategies?

Suppose the game is played indefinitely, where each player's payoff in the repeated game is the aggregated sum of his or her payoffs from each round. Does there exist a subgame perfect equilibrium in this infinitely repeated game? Please fully specify the strategy profiles

U M D L 3,2 2,2 1,3 R 2,1 3,3 0,0