The following data are for calculator sales in units at

The following data are for calculator sales in units at an electronics store over the past five weeks:

WeekSales

1 .......46

2 .......49

3 .......43

4 .......50

5 .......53


Use trend-adjusted exponential smoothing with α = 0.2a and β = 0.2 to forecast sales for weeks 3 through 6. Assume that the average of the time series was 45 units and that the average trend was +2 units per week just before week 1.