Develop a two-period weighted moving average forecast for periods 12 through 15 . Use weights of 0.9 and 0.4, with the most recent observation weighted higher. \begin{tabular}{cc} \hline Period & Demand \\ \hline 10 & 246 \\ 11 & 388 \\ 12 & 436 \\ 13 & 249 \\ 14 & 402 \\ \hline \end{tabular} Calculate the forecasts fos pariods 12 - 15 by using a fwo-phriod weighted moving average model (enter your responses rounded to the nearest whole number) \begin{tabular}{ccc} \hline Period & Demand & Forecast \\ \hline 10 & 246 & \\ 11 & 388 & \\ 12 & 436 & 312 \\ \hline \end{tabular}