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ii. Perform exponential smoothing to forecast both prices for period 253 . Use successive values of 0.15 , 0,35 , 0.55 , and 0.75 for

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ii. Perform exponential smoothing to forecast both prices for period 253 . Use successive values of 0.15 , 0,35 , 0.55 , and 0.75 for the smoothing parameter a. Next , calculate the MAPD (Mean Absolute Percentage Deviation ) of each forecast ; and based on the MAPDs , determine the value of a that has yielded the most accurate forecast for each

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