Assume a trigger strategy: Player i contributes by 10 in the first period. In all other periods player i contributes by 10 only if all players contributed by 10 in all previous periods, otherwise she contributes by O. Q11. find the range of the values of the discount factor such that a Subgame Perfect outcome of the repeated game is that where all players choose to contribute 10 in all stages. Q12. Assume a variation of the trigger strategy where the punishment is played for only two periods. Find the range of the values of the discount factor such that a Subgame Perfect outcome of the repeated game is that where all players choose to contribute 10 in all stages