Use the data set below to answer the questions that follow. Period Demand Sales Volume 1 1000 2 1200 3 1450 1650 5 1700 1850 b. Find the four-period simple moving average forecasts for Periods 5 and 6. Find the four-period weighted moving average forecasts for Periods 5 and 6 using weights of 0.05, 0.25. 0.30, and 0.40 from the earliest period to the latest period, respectively. Which set of forecasts is more accurate, the simple moving average forecasts or the weighted moving average forecasts? Why is that set of forecasts more accurate in this particular case (using Data Set E4)? Will that type of forecast always be more accurate? Why or why not? d