Consider the Normal Form Game characterized in the following figure: P1 \\P2 b1 62 63 a1 (1,2) (0,1) (0,3) a2 (3,-1) (1,1) (-1,0) a3 (2,2) (1,-1) (3,0) a4 (-5,1) (-1,0) (-3.-2) a5 (-3,3) (3,0) (2,4) What is the Best Response of player 2 if player 1 plays a5? O b1 O b2 O b3 O {b1, b2}