A Quality Analyst wants to construct a control chart for determining whether three machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results:MachineMeasurements#$117151517$#$216251825$#$323242322$Using the factors for three sigma control limits$,$ what are the x$-$bar chart upper and lower control limits$?$ Question $8$ options:$24\mathrm{.}33$ and $15\mathrm{.}6723\mathrm{.}29$ and $16\mathrm{.}7123\mathrm{.}5$ and $16\mathrm{.}523\mathrm{.}16$ and $16\mathrm{.}84$