Consider the piston ring data shown in Table $6\mathrm{.}3.$ Assume that the specifications on this component are $74\mathrm{.}000+0\mathrm{.}05$ mm$.($a$)$ Set up and Rcontrol charts on this process. Is the process in statistical control? $($b$)$Note that the control limits on the chart in part $($a$)$ are identical to the control limits on the x chart in Example $6\mathrm{.}3,$where the limits were based on s$.$ Will this always happen? $($c$)$ Estimate process capability for the piston$-$ring process. Estimate the percentage of piston rings produced that will be outside of the specification.