Delta Corps plant in Austin has been experiencing imbalances in its inventory of components used in the production of a line of computer printers. Both stock shortages and overstock conditions are occurring. The production analysis group is studying the pattern of demand for component PS2400, a power supply used in many of Deltas products. The group believes that the most recent 12 weeks of demand for the PS2400 is representative of the future weekly demand:

Use a three-week moving average to develop a forecast of the demand for the PS2400 component in week 13.

\begin{tabular}{cc|cc|cc|cc:c:c} \hline \hline Week & Demand (Units) & Week & Demand (Units) & Week & Demand (Units) & Week & Demand (Units) \\ \hline 1 & 159 & 4 & 161 & 7 & 203 & 10 & 168 \\ 2 & 217 & 5 & 173 & 8 & 195 & 11 & 198 \\ 3 & 186 & 6 & 157 & 9 & 188 & 12 & 159 \\ \hline \hline \end{tabular}