MUST DO ALL PARTS

Do not include anything other than numbers in your responses. For example, do not include comma or dollar sign in your numbers. As a rule of thumb, keep 2 decimal places for larger numbers and 3 decimal places for smaller numbers less than 1. Use the following data to calculate the MAD and MSE of the forecasts.

Calculate the mean absolute deviation (MAD) of the forecasts?

Calculate the mean squared errors (MSE) of the forecasts?

\begin{tabular}{|l|l|l|} \hline Period & Demand & Forecasts \\ \hline 1 & 256 & \\ \hline 2 & 270 & 259 \\ \hline 3 & 248 & 244 \\ \hline 4 & 265 & 244 \\ \hline 5 & 244 & 246 \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline Period & Absolute Error \\ \hline 1 & \\ \hline 2 & \\ \hline 3 & \\ \hline 4 & \\ \hline 5 & \\ \hline \end{tabular}