Consider the following exterisive starts, player 1 has two avalldured with a capital letter and the information. When the game starts, player 1 has town have been named with a capitar is player payoff, and payoffs for the two players are shown for each terminal history; the leftmost is the rightmost is player 2 's payoff. (a) (4 marks) Find all subgame perfect equilibria of the game. (b) (9 marks) Justify your answer to (a). (c) (4 marks) Suppose that the action G of player 2 is missing. Find all subgame perfect equilibria of the new game. (d) ( 8 marks) Justify your answer to (c)