Open a blank Excel workbook, and then upload the Champagne Sales Download Champagne Sales .CSV file using the buttons in the Data tab. Once you've done that, use Forecast Sheet to forecast the next two years of champagne sales. Take note of the seasonality component. Add another Forecast Sheet where you manually set Seasonality to 4 periods. The Excel document you submit should have 3 worksheets: one with the Champagne Sales data, one with the automatic seasonality forecast, and a third with the manual seasonality set to 4 periods. Date Perrin Freres monthly champagne sales millions ?

Date	Perrin Freres monthly champagne sales millions ?64-?72	Column1
1/1/64	2815
2/1/64	2672
3/1/64	2755
4/1/64	2721
5/1/64	2946
6/1/64	3036
7/1/64	2282
8/1/64	2212
9/1/64	2922
10/1/64	4301
11/1/64	5764
12/1/64	7312
1/1/65	2541
2/1/65	2475
3/1/65	3031
4/1/65	3266
5/1/65	3776
6/1/65	3230
7/1/65	3028
8/1/65	1759
9/1/65	3595
10/1/65	4474
11/1/65	6838
12/1/65	8357
1/1/66	3113
2/1/66	3006
3/1/66	4047
4/1/66	3523
5/1/66	3937
6/1/66	3986
7/1/66	3260
8/1/66	1573
9/1/66	3528
10/1/66	5211
11/1/66	7614
12/1/66	9254
1/1/67	5375
2/1/67	3088
3/1/67	3718
4/1/67	4514
5/1/67	4520
6/1/67	4539
7/1/67	3663
8/1/67	1643
9/1/67	4739
10/1/67	5428
11/1/67	8314
12/1/67	10651
1/1/68	3633
2/1/68	4292
3/1/68	4154
4/1/68	4121
5/1/68	4647
6/1/68	4753
7/1/68	3965
8/1/68	1723
9/1/68	5048
10/1/68	6922
11/1/68	9858
12/1/68	11331
1/1/69	4016
2/1/69	3957
3/1/69	4510
4/1/69	4276
5/1/69	4968
6/1/69	4677
7/1/69	3523
8/1/69	1821
9/1/69	5222
10/1/69	6872
11/1/69	10803
12/1/69	13916
1/1/70	2639
2/1/70	2899
3/1/70	3370
4/1/70	3740
5/1/70	2927
6/1/70	3986
7/1/70	4217
8/1/70	1738
9/1/70	5221
10/1/70	6424
11/1/70	9842
12/1/70	13076
1/1/71	3934
2/1/71	3162
3/1/71	4286
4/1/71	4676
5/1/71	5010
6/1/71	4874
7/1/71	4633
8/1/71	1659
9/1/71	5951
10/1/71	6981
11/1/71	9851
12/1/71	12670
1/1/72	4348
2/1/72	3564
3/1/72	4577
4/1/72	4788
5/1/72	4618
6/1/72	5312
7/1/72	4298
8/1/72	1413
9/1/72	5877