1. In the summer of 2021 researchers at UAA were gathering commuter travel data in Anchorage. One day they took a random sample Of 15 bike commuters and recorded their ages (in years): 19 18 25 19 23 20 40 18 21 20 20 18 19 28 17. (a) Give two measures (and their values) for the center and variation of this dataset. (b) Construct a boxplot for this dataset showing all your steps and comment on its shape. (c) Give the five-number summary of the dataset. (d) What percentage of this dataset is within two standard deviations of the mean? How does this percentage compare to Chebyshev's rule and the empirical rule?