Exponintial Smoothing, engineering homework help

I just need help with this question. 

Question 1

The monthly sales data for Datastream, Inc., which produces network routers for small companies, are given in Table below.

Month

Sales

1

34.00

2

33.00

3

42.00

4

34.00

5

36.00

6

43.00

7

34.00

8

33.00

9

43.00

10

31.00

11

35.00

12

41.00

The sales manager wants to forecast for months 13, 14 and 15. Compute the forecast using exponential smoothing method with a = 0.25 and initial forecast value (F1) of 36.58.

Thanks in advance! 

q1.doc

 
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