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