The amount of mineral water filled in 2-liter bottles by an automatic bottling machine is monitored using a control chart. The actual contents of random samples of 4 bottles collected on 8 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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6 8 2.015 2.006 1.999 1.983 2.000 999 2.011 .983 2.012 1.983 .988 2.008 2.016 1.982 1.983 1.991 2.001 1.996 2.012 .999 2.016 997 1.983 1.989 2.019 2.003 2.015 .999 988 2.005 2.000 998 2.018 1.98 2.004 2.005 986 2.017 2.006 .990