Use the following setting for questions 4-9. Consider the following static Prisoner's Dilemma game. For the following parts, suppose this game is played for innitely many times with discount factor for both players 5 E [0, 1). 7. Let both players adopt the following strategy: start with cooperation; cooperate if both players cooperated or both ptayers defected in the previous period; defect if one player defected and another ptayer cooperated in the previous period. In other words, the punishment for deviating from cooperation only lasts for one period, and both players revert to cooperation immediately after. Rounded to the nearest tenth, what is the condition on 6 for this strategy prole to be a SPNE? (a) 5>0