After graduating from college, you and your friends start selling birdhouses made from recycled plastic. The idea has caught on, as shown by the following sales figures. 10.1. Prepare forecasts for June through September by using a three-period moving average model. (DO NOT only enter your final responses. You need to write your solutions).

\begin{tabular}{lcc} \hline \multicolumn{1}{c}{ Month } & Demand & Forecast \\ \hline March & 150 & \\ April & 2,910 & \\ May & 1,260 & \\ June & 4,770 & \\ July & 3,830 & \\ August & 5,940 & \\ September & & \\ \hline \end{tabular}