3. In a three-period bargaining game of alternating offers, player 1 makes an offer in period 1. [f the offer is rejected, player 2 makes an offer in period 2, and, nally if that offer is rejected, player 1 makes an offer in period 3. They are trying to divide a pie of unit size that 's innitely divisible. The one-period discount factor for either player is equal to 0.5. Find the SPE of this game assuming that either player always accepts an offer in case the payoff of rejecting the offer is the same