Identify the outlier in the data. then find the mean when the outlier is included and when it is not included.
68, 63, 67, 66, 65, 87, 69, 61, 86, 82, 28

a. outlier is 28; mean with outlier = 67; mean without outlier = 67.5

b. outlier is 28; mean with outlier = 74.2; mean without outlier = 71.4

c. outlier is 28; mean with outlier = 67.5; mean without outlier = 71.4

d. outlier is 28; mean with outlier = 67.5; mean without outlier = 64.9