Valentine's Day Is the Best Day of the Year for Selling

Essay

Valentine's Day is the best day of the year for selling roses at River Road Florist. Dozens of roses sold on Valentine's Day over six years are as follows:
$\begin{array}{|c|c|}\hline \text { Year } & \text { Dozen } \\\hline 2005 & 104 \\\hline 2006 & 109 \\\hline 2007 & 101 \\\hline 2008 & 114 \\\hline 2009 & 104 \\\hline 2010 & 100 \\\hline\end{array}$
a.What is the forecast for Valentine's Day in 2011 using a three-period moving average?
b.What is the forecast for Valentine's Day in 2011 using a five-period moving average?
c.What is the mean absolute deviation (MAD) for years 2008-2010 using a three-period moving average?
d.What is the tracking signal for years 2008-2010 using a three-period moving average?