Question: please help how to get the answer for 3 and 4 and 5 Practice Problems for Demand Forecasting. Month Sales for the past 8 months

please help how to get the answer for 3 and 4 and 5

Practice Problems for Demand Forecasting. Month Sales for the past 8 months are as follows: Month Sales Jan 20 Feb 24 Sales 37 May Jun 47 53 Mar 27 Jul 62 31 Aug Apr 1. What are the 3-month moving average forecasts for each of the months May through August? 2. What are the 4-month moving average forecasts for each of the months May through August? 3. What are the exponential smoothing forecasts with a = 0.2 for each of the months Feburuary through August? Assume that the forecast for January was 20. 4. What are the exponential smoothing forecasts with a = 0.7 for each of the months Feburuary through August? Assume that the forecast for January was 20. 5. Compare the performance of the above four models for the months May through August by using the mean absolute deviation as the performance criterion. Which model would you recommend

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