In How It Works 3.2, we created a bar graph for the 2012 GDP, in U.S. dollars per capita, for each of the G8 nations. In How It Works 3.3, we created a Pareto chart for these same data.

a. Explain the difference between a Pareto chart and a standard bar graph in which the countries are in alphabetical order along the x-axis. 

b. What is the benef it of the Pareto chart over the standard bar graph?