Each chart has which three components (choose three)? Check All That Apply Forecast of customer demandForecast of customer demand A center line representing the averageA center line representing the average An upper line representing last week's sampleAn upper line representing last week's sample A lower line representing last week's sampleA lower line representing last week's sample An upper line representing the maximum acceptable variation upwardsAn upper line representing the maximum acceptable variation upwards A lower line representing the maximum acceptable variation downwardsA lower line representing the maximum acceptable variation downwards A center line representing the maximum acceptable variation centrally