A supermarket has experienced weekly demand of milk of D1=130,D2=120,D3=136, and D4 =145 gallons over the last four weeks. Forecast demand for Period 5 using a three-period moving average. \begin{tabular}{l} 128.25 \\ 133.67 \\ 142.00 \\ 127.67 \\ \hline 123.67 \end{tabular}