So what's my expected payoff from choosing Up where I believe the other person's going to choose Left and Right, equally likely? It's what?

那么在我对手选择左或右,可能性相同的情况下,我的预期收益会是什么样的呢

耶鲁公开课 - 博弈论课程节选

What about my expected payoff from choosing Middle against , so in this case where I think it's equally likely that my opponents going to choose Left or Right?

那我在情况下,选中的预期收益是什么呢,在此情况下我依然认为,对手选左选右的可能性相同

耶鲁公开课 - 博弈论课程节选