11. For the Hawkins Company, the monthly percentages of all shipments received on time over the past 12 months are 80,82,84,83,83,84,85,84,82,83,84, and 83 . a. Construct a time series plot. What type of pattern exists in the data? b. Compare a three-month moving average forecast with an exponential smoothing forecast for =0.2. Which provides the better forecasts using MSE as the measure of model accuracy? c. What is the forecast for next month