The following time series shows the sales of a particular product over the past 12 months. (a) Construct a time series plot. What type of pattern exists in the data? The data appear to follow a trend pattern. The data appear to follow a cyclical pattern. The data appear to follow a horizontal pattern. The data appear to follow a seasonal pattern. Use =0.3 to compute the exponential smoothing fore a=0.5 Does a smoothing constant of 0.3 or 0.5 appear to provide more accurate forecasts based on MSE? A smoothing constant of 0.5 is better than a smoothing constant of 0.3 since the MSE is greater for 0.5 than for 0.3 A smoothing constant of 0.3 is better than a smoothing constant of 0.5 since the MSE is greater for 0.3 than for 0.5 A smoothing constant of 0.3 is better than a smoothing constant of 0.5 since the MSE is less for 0.3 than for 0.5 . A smoothing constant of 0.5 is better than a smoothing constant of 0.3 since the MSE is less for 0.5 than for 0.3