Exercises 22–24 involve data sets described in Appendix C. These data sets are available in the Instructor Resources. 22. Refer to the file lung.csv. a. Construct a histogram for the values of FEV1. b. Is the histogram symmetric, skewed to the left, or skewed to the right? c. Construct a boxplot for the values of FEV1. d. Are there any outliers in these data? If so, are they unusually large or unusually small values? 23. Refer to the file gravity.csv. a. Construct a histogram for the measurements of the acceleration due to gravity. b. Apart from outliers, is the histogram unimodal or bimodal? c. Construct a boxplot for the measurements of the acceleration due to gravity. d. How many outliers are in these data? 24. Refer to the file pit.csv. a. Consider the pits at 52 weeks duration. Construct comparative boxplots for the depths at 40% and 75% relative humidity. b. Using the boxplots, what differences can be seen in the distributions of depths at 40% and 75% relative humidity?