So there is this game tree on game theory and using the backwards induction method I came to the following point : Player 1 can choose west and get 8 while #2 gets 4, or he can choose east and then player 2 is choosing. If he chooses Middle, player 2 gets 8 and player 1 gets 12. If he chooses bottom then player 1 decides. His decision is player 1 getting 4 and player 2 getting 8. That would make player 2 indifferent cause he gets 8 no matter which one he chooses. How do I find the SPNE in this one?