Question: What is the mean error for the cumulative mean forecast for Product C? (format x.xx or -x.xx) What is the mean error for the cumulative

What is the mean error for the cumulative mean forecast for Product C? (format x.xx or -x.xx)

What is the mean error for the cumulative mean forecast for Product D? (format x.xx or -x.xx)

What is the mean squared error for the cumulative mean forecast for Product E? (format x.xx, xx.xx or xxx.xx)

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