b. Compare a three-month moving average forecast with an exponential smoothing forecast. Use a = 0.2. Which provides the better forecasts based on MSE? Do not round your intermediate calculations and round your final answers to two decimal places. Moving Exponential smoothing average MSE The values of Alabama building contracts (in millions of dollars) for a 12-month period follow. 230 360 230 250 290 330 220 300 230 300 260 210 a. Choose the correct time series plot. (i) Value (Millions of dollars) 400 350 300 M 250 200 150 100 50 Month (t) 1 0 1 2 3 4 5 6 7 8 9 10 11 12 b. Compare a three-month moving average forecast with an exponential smoothing forecast. Use a = 0.2. Which provides the better forecasts based on MSE? Do not round your intermediate calculations and round your final answers to two decimal places. Moving Exponential smoothing average MSE The values of Alabama building contracts (in millions of dollars) for a 12-month period follow. 230 360 230 250 290 330 220 300 230 300 260 210 a. Choose the correct time series plot. (i) Value (Millions of dollars) 400 350 300 M 250 200 150 100 50 Month (t) 1 0 1 2 3 4 5 6 7 8 9 10 11 12