shown here. \begin{tabular}{c|cccccccccc} \hline Week & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Rentals & 14 & 19 & 31 & 24 & 24 & 23 & 18 & 35 & 11 & 11 \\ \hline \end{tabular} a. Prepare a forecast for weeks 6 through 10 by using a 4-week moving average. (Enter your responses rounded to two decimal places.) \begin{tabular}{cc} \hline Week & Forecast \\ \hline 6 & \end{tabular}