Checkout time at a supermarket is monitored using a range and mean chart. Six samples which contain 20 observations per sample have been collected and the sample means and sample ranges have been computed as shown below:SampleMeanRange13.050.4223.010.4433.110.3943.450.4954.110.5363.090.45QUESTION: Determine the UCL and LCL for the X-Bar and the R-Chart for the sample size of 6.