2. AControl charts are being used to monitor the time to complete a particular service process at a retail store. The control limits for an X chart and an R chart have already been calculated and are as follows: (i) For the X chart, the upper control limit is 52 seconds and the lower control limit is 47 seconds. For the R chart, the upper control limit is 6 seconds and the lower control limit is 0 seconds. (10 pts.) a) Use Excel to plot both the X chart and the R chart. On each chart, show the specified control limits and plot the following 7 new samples (\#21 - \#27). Use copy and paste to include the X chart and the R chart in your exam below. - Paste X chart and R chart here - (2 pts.) b) According to the charts in part a, is this process most likely in-control or out-of-control