Sales of Cool-Man air conditioners have grown steadily during the past 5 years:Year Sales1 4402 4653 5204 5735 5866 ?The sales manager had predicted, before the business started, that year 1’s saleswould be 410 air conditioners.a. Using exponential smoothing with a weights of a = 0.30, 0.60, and 0.90develop forecasts for years 2 through 6.b. What effect did the smoothing constant have on the forecasts for Cool-Man airconditioners?c. Which smoothing constant gives the most accurate forecast?d. Use a three-year moving average forecasting model to forecast the sales ofCool-Man air conditioners.e. Use the trend projection method to develop a forecast for the sales of Cool-Man air conditioners.f. Which of the five models you developed was the most accurate (best)?