Ten weeks of data on Commodity Futures Index are 7.35, 7.40, 7.55, 7.56, 7.60, 7.52, 7.52, 7.70, 7.62, and 7.55.
a. Calculate the exponential smoothing forecasts for a = .2.
b. Calculate the exponential smoothing forecasts for a = .3.
c. Which exponential smoothing constant offers more accurate forecasts based upon MSE? Forecast week 11.