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:
$$\begin{array} { c c } \text { Year } & \text { Dozen } \\\hline 2005 & 104 \\2006 & 109 \\2007 & 101 \\2008 & 114 \\2009 & 104 \\2010 & 100\end{array}$$
a. What is the forecast for Valentine's Day in 2011 using a 3-period moving average?
b. What is the forecast for Valentine's Day in 2011 using a 5-period moving average?
d. What is the MAD for years 2008 ? 2010 using a 3-period moving average?
e. What is the tracking signal for years 2008 ? 2010 using a 3-period moving average?