The Energy Information Administration reported the following sources of electricity in the United States in 2016:

Source of Electricity                          Percentage
Coal.....................................................................32%
Hydro and renewables.....................................14%
Natural gas.........................................................33%
Nuclear power...................................................19%
Other.....................................................................2%

a. Construct a Pareto chart.

b. What percentage of power is derived from coal, nuclear power, or natural gas?

c. Construct a pie chart.

d. For these data, do you prefer using a Pareto chart or a pie chart? Why?