1) 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 7 8 9 Value 18 13 16 11 17 14 15 10 17 A. Construct a time series plot, what type of pattern exists in the data? B. Develop a three-week moving average for this time series. MAD MSE Forecast for week 10 C. Use an alpha of 0.2 to compute the exponential smoothing values for the time series. MAD MSE Forecast for week 10 D. Compare the three-week moving average with the exponential cast using alpha .2, which appears to be the better forecasting method