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The number of heart surgeries performed at Heartville General Hospital has increased steadily over the past several years. The hospitals administration is seeking the best method to forecast the demand for such surgeries in year 6. The data for the past five years are shown below. Year 2 4 Demand 43 47 54 50 62 The hospitals administration is considering using the two-year weighted moving with weights 0.6 and 0.4 and the more recent data given more weight. Beginning error measurement in year 3, please calculate the following performance criteria. 1. The MAD is(keep two decimal places). 2. The MSE is(keep two decimal places) 3. The MAPE is | % (keep two decimal places).

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