Failure of a corporation to obey both federal and state environmental regulations may result in irreparable damage to the environment and costly financial penalties to the firm. The accompanying table lists the financial penalties (thousands of dollars) assessed in 38 civil actions filed against Arkansas companies by the U.S. Department of Justice and the Environmental Protection Agency. The penalties were assessed for violations of at least one of several different environmental laws, including the Clean Air Act (CAA). (Penalties assessed due to CAA violations are marked with an asterisk in the table.)

a. Construct a stem-and-leaf display for all 38 penalties.
b. Circle the individual leaves that are associated with penalties imposed for CAA violations.
c. What does the pattern of circles in part b suggest about the severity of the penalties imposed for CAA violations relative to the other types of violations reported in the table? Explain.

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