The Air Travel Consumer Report, a monthly product of the Department of Transportation 's Office of Aviation Enforcement and Proceedings (OAEP), is designed to assist consumers with information on the quality of services provided by airlines. The report includes a summary of consumer complaints by industry group and by complaint category. A breakdown of the 878 January 2019 consumer complaint s based on industry group is given in the following table stored in OAEP Complaints by Group:

a. Construct a Pareto chart for the number of complaints by industry group. What industry group accounts for most of the complaints?
The 878 consumer complaints against airlines are summarized by type in the following table stored in OAEP Complaints by Category:

b . Construct pie and doughnut charts to display the percentage of complaints by type. What complaint category accounts for most of the complaints?

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Number of Consumer Industry Group U.S. Airlines Complaints 506 Non-U.S. Airlines 336 Travel Agents 27 Miscellaneous 9. Industry Total 878