Use the data set below to answer the questions that follow. (Show your work for maximum credit) Period Demand Sales Volume 123456100012001450170018501050 a. Find the four-period simple moving average forecasts for Periods 5 and 6 . b. Find the fourperied weighted moving average forecasts for Periods 5 and 6 using weights of 0.05,0.25,0.30, and 0.40 trom the earlieat period to the iatest period. respectively. c. Which set of forecasts is more accurate, the simple moving average forecasts or the woighted moving average forecasts? Why is that set of forecasts more accurate in this particular case? d. Wa that type of forecast always be more accurase? Why or why not