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3 Given is a historical time series for job services demand in the prior 6 months. Month Demand 1 27 2 28 3 27 4 26 5 5 30 6 6 128 a) The MAD based on the Exponential smoothing a = 0.2 method = [a] (4 decimal places) Correct answer: 1.1779 b) The MAD based on the 3 months moving average method = [b] (in 4 decimal places) Correct answer: 1.5556 c) The MSE based on the 3 months moving average method = [c) Correct answer: 5.4444