Develop a two-period weighted moving average forecast for periods 12 through 15 . Use weights of 0.6 and 0.4 , with the most recent observation weighted higher. \begin{tabular}{cc} \hline Period & Demand \\ \hline 10 & 227 \\ 11 & 415 \\ 12 & 417 \\ 13 & 278 \\ 14 & 432 \\ \hline \end{tabular} Calculate the forecasts for periods 12 - 15 by using a two-period weighted moving average model (enter your responses rounded to the nearest whole number). \begin{tabular}{ccc} \hline Period & Demand & Forecast \\ \hline 10 & 227 & \\ 11 & 415 & \\ 12 & 417 & \\ 13 & 278 & \\ 14 & 432 & \\ 15 & & \\ \hline \end{tabular}