Centerville Bikes and Stuff (CBS) sells motorcycles and accessories. The number of helmets sold by CBS per week for the past six weeks follows.

Week	1	2	3	4	5	6
Value	19	12	14	11	15	13

Develop the three-week moving average for this time series. (Round your answers to two decimal places.)

Week	Time Series Value	Forecast
1	19
2	12
3	14
4	11
5	15
6	13

Compute MSE. (Round your answer to two decimal places.)

MSE =

What is the forecast for week 7?

Use = 0.2 to compute the exponential smoothing values for the time series.

Week	Time Series Value	Forecast
1	19
2	12
3	14
4	11
5	15
6	13

Compute MSE. (Round your answer to two decimal places.)

MSE =

What is the forecast for week 7? (Round your answer to two decimal places.)

Use = 0.4 to compute the exponential smoothing values for the time series.

Week	Time Series Value	Forecast
1	19
2	12
3	14
4	11
5	15
6	13