can you find the x-chart and r-chart as well

An automatie lathe produces rollers for roller bearings, and the process is monitored by statistical process control charts. The central line of the chart for the sample means is set at 8.50 and for the mean range at 0.26mm. The process is in control, as established by samples of size 4 . The upper and lower specifications for the diameter of the pollers are (8. S0+0.25) and (8. 50 - 0.25 ) mm, respectively. Click the icon to view the tabie of tactors for calculating thee-signa limits for the xactulf-chart. a. Calculate the control limits for the mean and range charts. The UCL equas mm and the LClR equals mm. (Enter your rosponses rounded to two decimal places) Factors for calculating three-sigma limits for the x-chart and R-chart