The capacity of the fuel tank of the 2007 Volvo S40 is designed to be 12.625 gallons. The actual capacity of tanks produced is controlled using a control chart. The data of 9 random samples of size 5 each collected on 9 different days are tabulated below. Draw X-bar, R, and s charts. Is the process in control? If it is not, remove the sample that is out of control, and redraw the charts.

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8 9 12.667 12.600 12.599 12.607 12.738 12.557 12.646 12.710 12.529 12.598 12.711 12.583 12.524 12.605 12.745 12.647 12.627 12.725 12.685 12.653 12.515 12.718 12.640 12.626 12.651 12.605 12.306 12.700 12.703 12.653 12.615 12.653 12.694 12.607 12.648 12.551 12.722 12.579 12.599 12.554 12.507 12.574 12.589 12.545 12.600