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1.Weekly sales of copy paper at Cubicle Suppliers are provided in the table below.Compute a three-period moving average and a four-period moving average for weeks 5,6, and 7. Compute the MAD for both forecasting methods. Which model is moreaccurate? Forecast week 8 with the more accurate method.WeekSales (cases)1172213274315196177212.A management analyst is using exponential smoothing to predict merchandise returns at anupscale branch of a department store chain. Given an actual number of returns of 154 items in themost recent period completed, a forecast of 172 items for that period, and a smoothing constant of0.3, what is the forecast for the next period? How would the forecast be changed if the smoothing