Aspen Plastics produces plastic bottles to customer orders $($MTO$).$ The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the bottleneck. The dimensions $($in inches$)$ from the last six samples are provided in the table below:

Assume that only these six samples are sufficient and use the data to determine the control limits for an R$-$ and an X$-$bar $-$chart.

Use Table $3\mathrm{.}1$ from the book $($or slide $26$ of the STUDENT version presentation$)$ to obtain the A$2,$ D$3,$ and D$4$ values