Calculate MSE for the 4 periods for which the actual and forecasted number of customers given in the table below: Period Actual Number of Customers Forecasted Number of Customers Error 1 1,975 2,000   2 2,050 2,025   3 1,925 1,975   4 2,075 2,025 0 390.63 37.5 6,250 1,562.5

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