A manager wishes to build a $3-$sigma range chart for a process. The sample size is $7,$ the mean of sample means is $16\mathrm{.}01,$ and the average range is $3\mathrm{.}5.$ What are the UCL and $LCL,$ respectively, for this Range chart?

Note: The Table for A$2,$ D$3$ and D$4$ should show imbedded below. It can also be found in your hard copy textbook or the PPT slide deck $($assuming you printed it$).$

Control Chart Factors $($Table S$6\mathrm{.}1)$

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