The data below, stored in Computer Usage represent the hours per day spent by American desktop and laptop users from 2008 to 2017.

a. Plot the time series.
b. Fit a three-year moving average to the data and plot the results.
c. Using a smoothing coefficient of W = 0.50, exponentially smooth the series and plot the results.
d. What is your exponentially smoothed forecast for 2018?
e. Repeat (c) and (d), using W = 0.25.
f. Compare the results of (d) and (e).
g. What conclusions can you reach about desktop/laptop use by American users?

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Year Hours per Day Year Hours per Day 2008 2.2 2013 2.3 2009 2.3 2014 2.2 2010 2.4 2015 2.2 2011 2.6 2016 2.2 2012 2.5 2017 2.1