ITSCM 306 Practice Problems Set-1 3. A ski repair resort in Colorado sells replacement poles each season. The shop needs to develop a forecast of next season's sales so that they can place an order for poles with their supplier well in advance of the beginning of the scason. Sales data for the past five years are shown below. Compare the forecasts using the following models. Year Sales (Units) 475 2 495 3 460 4 500 5 480 Develop a forecast for the sixth year using: a. A five-year moving average b. A weighted moving average model with weights of 0.1, 0.1, 0.2, 0.3, and 0.3 for years 1 through 5 respectively, 0. An exponential smoothing model with year 5 forecast of 470 and alpha 0.3