题目

Are you a person who is good at making friends？As we all know，there are some people who seem to be surrounded by friends always，and there are others who always seem to be standing on the outside. If you are one of the outsiders，it is time to break out of your shell and start making new friends.【1】.1. Be yourselfIn fact，if you aren't yourself，it isn't you that others are becoming friends with. If you do not act like yourself，you may not be well received，because you are a totally different person，【2】.2. Start with people you knowReach out to people you have known, and r随机变量η的分布列如下:ξ123456P0.2x0.350.10.150.2则(1)x=________________;(2)P(η>2)=________________;(3)P(1＜η≤4)=______________.