The following data is sales in millions of dollars for the Cassie Cat Company manufactures of grain free canned cat food. 

Year.            1.          2.          3.          4.          5.          6.          7 

Sales.          20.      22.        26.       24.        30.         28.        32 

a, Use a three year moving average to generate a forecast for year 8 and determine its mean square error. 

b. Use a smoothing constant 0f .8 to generate a forecast for year 8 and determine its mean square error. 

c. Which method is the better?