The file Smartphone Sales contains the market share of smartphones by type from 2010 to 2014. (Data

Question:

The file Smartphone Sales contains the market share of smartphones by type from 2010 to 2014. (Data extracted from "Android and iOS squeeze the Competition...," bit.ly/1JV5qRR).
a. Construct sparklines of smartphone sales by type.
b. What conclusions can you reach concerning smartphone sales from 2010 to 2014?