The mean value of land and buildings per acre from a sample of farms is ​$1200, with a standard deviation of ​$200 . The data set has a​ bell-shaped distribution. Using the empirical​ rule, determine which of the following​ farms, whose land and building values per acre are​ given, are unusual​ (more than two standard deviations from the​ mean). Are any of the data values very unusual​ (more than three standard deviations from the​ mean)?
​$1080 $1659 $907 $568 ​$1597 ​$888
Which of the farms are unusual​ (more than two standard deviations from the​ mean)? Select all that apply.
A. $568
B.$907
C.$1597
D.$1080
E.$1659
F.$888