Market shares for a period of 14 months for various Internet providers are contained in the data file Browser Wars.
a. Use a time-series plot to graphically display the worldwide market shares of IE, Firefox, Chrome, Safari, and Opera.
b. Use a time-series plot to graphically display the European market shares of IE, Firefox, Chrome, Safari, and Opera.
c. Use a time-series plot to graphically display the North American market shares of IE, Firefox, Chrome, Safari, and Opera.