1. Using the 60-period data shown in Exhibit 1, we are interested to forecast for the transformer requirement in the future. Consider the following forecasting methods: (1) 3-period moving average, (2) 5-period moving average, (3) weighted moving average with weights (0.5,0.3,0.2), (4) exponential smoothing method with a smoothing constant 0.2, and (5) exponential smoothing method with a smoothing constant 0.5. Based on Exhibit 1, which forecasting method above best fits the data? Hint: compare the MAD. Please write down the MAD for each forecasting method.