Consider the quarterly sales data for Worthington Health Club shown below:

			Quarter		Total
Year	1	2	3	4	Sales
1	5	2	4	8	19
2	9	3	6	18	36
3	13	5	7	13	38
4	16	11	5	24	56
5	20	8	13	37	78

Develop a four-period moving average model and compute MSE for your forecasts. Do not round intermediate calculations. Round your answers to two decimal places.

Time Period	Observation	Forecast
1	5
2	2
3	4
4	8
5	9
6	3
7	6
8	18
9	13
10	5
11	7
12	13
13	16
14	11
15	5
16	24
17	20
18	8
19	13
20	37

MSE (4-period):

Find the best single exponential smoothing model by evaluating the MSE from 0.1 to 0.9, in increments of 0.1. Do not round intermediate calculations. Round your answers to two decimal places.

Alpha		MSE
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9