$2.$ Organic Grains LLC uses statistical process control to ensure that its health$-$conscious, low$-$fat, multigrain sandwich loaves have the proper weight. Based on a previously stable and in$-$control process, the control limits of the x$-$bar and R$-$charts are:

UCLx $=5\mathrm{.}12,$ LCLx $=4\mathrm{.}68$; UCLR $=0\mathrm{.}303,$ LCLR $=0.$

Over the past few days, they have taken five random samples of four loaves each and have found the following:$2.$ Organic Grains LLC uses statistical process control to ensure that its health$-$conscious, low$-$fat, multigrain sandwich loaves have the proper weight. Based on a previously stable and in$-$control process, the control limits of the x$-$bar and R$-$charts are:

UCLx $=5\mathrm{.}12,$ LCLx $=4\mathrm{.}68$; UCLR $=0\mathrm{.}303,$ LCLR $=0.$

Over the past few days, they have taken five random samples of four loaves each and have found the following: