In an issue of Consumer Reports, different cell phone providers and plans were compared. The monthly fees, in dollars, for a sample of the providers and plans are shown in the following table.

a. Use Table III in Appendix A to construct a normal probability plot of the given data.
b. Use part (a) to identify any outliers.
c. Use part (a) to assess the normality of the variable under consideration.

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40 110 90 30 70 70 30 60 60 50 60 70 35 80 75