Need help understanding problem five for extra practice, thank you.

STAT305/605 E100 Fall 2020 SFU Due September 25 5PM PST be the sample mean. Show that: in n - ( xi - 8 ) ? | = 0? i= (2 points) Problem 6 (bonus)the boundary between bins). (2 points) Problem 5 (bonus) Let X1, ..., Xn be independent and identically distributed random variables with finite first and second moment, and variance o'. Let X = _ _ Xi 2 of 3