The MAD for Method 1 = thousand gallons (round your response to three decimal places).

Part 3

The mean squared error (MSE) for Method 1 = (round your response to three decimal places).

Part 4

The MAD for Method 2 =. thousand gallons (round your response to three decimal places).

Part 5

The mean squared error (MSE) for Method 2 =. (round your response to three decimal places).

thousands of gallons: \begin{tabular}{ccc} \hline Week & ForecastMethod1 & ActualDemand \\ \hline 1 & 0.90 & 0.68 \\ 2 & 1.08 & 0.98 \\ 3 & 0.95 & 1.07 \\ 4 & 1.20 & 1.00 \\ \hline \end{tabular} \begin{tabular}{ccc} \hline Week & ForecastMethod2 & ActualDemand \\ \hline 1 & 0.77 & 0.68 \\ 2 & 1.21 & 0.98 \\ 3 & 0.92 & 1.07 \\ 4 & 1.11 & 1.00 \\ \hline \end{tabular}