The download and upload speeds of a mobile data carrier is of great interest to both individual and business users. The file City Download Speeds contains the average download speeds in Mbps for 100 cities in the United States.

For the average download speed:
a. Calculate the mean, median, first quartile, and third quartile.
b. Calculate the range, interquartile range, variance, standard deviation, and coefficient of variation.
c. Construct a boxplot. Are the data skewed? If so, how?
d. What can you conclude about the download speeds for the various U.S. cities?