explain the behaviour intuition of: In the standard ultimatum game, one proposer and one responder split a fixed sum of $10. The proposer proposes a division: x shares for the proposer and 1-x shares for the responder. At the same time, the responder states a minimum acceptable offer (MAO) that is the amount below which the responder will reject the offer. Both paired subjects receive the proposed amounts if proposer's offer exceeds responder's minimum acceptable offer. Otherwise, both receive z