1.Sales of Cool-Man air conditioners have grown steadily during the past 5 years according to the following table:

(a)The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of a=0.3, develop forecasts for years 2 through 6.

(b)Use a three-year moving average forecasting model to forecast the sales of Cool-Man air conditioners.

(c)Use linear trend method to forecast the sale in Year 6.

Year

1

2

3

4

5

6

Sales

450

495

518

563

584

?