4. The game to the right is an example of Chicken where T>R>P>S. Consider the following tit-for-tat strategy TFT={startwithAplaywhateveryouropponentdidinthepreviousperiod a. Consider a repeated version of this game, where the ending period is finite, but unknown. Under what condition is (TFT, TFT) a Nash equilibrium? b. Is (TFT, TFT) a subgame perfect Nash equilibrium (SPNE)? Note: no illustrations are necessary to justify your answer but you do need to consider potentialities where TFT is paired with some strategy other than TFT