On July 31, 2015, usatoday.com reported on big oil profits. The file BIGOIL contains the quarterly combined net incomes of the oil companies that are part of the S&P 500 Index for 2006 through the first half of 2015. The article discussed that after years of record profits, the oil companies were reporting their lowest profits in years due to the dramatic fall in crude oil prices during the latter part of 2014 and 2015. Develop the appropriate chart to display the oil company net incomes. Be sure to label the chart appropriately.