The following table contains the measurements of the kev lenath dimension from a fuel injector. These samples of size five were taken at one-hour intervals. Use three-sigma control limits. Use a. Calculate the mean and range for the above samples. (Do not round intermediate calculations. Round your answers to 3 decimal places.) b. Determine X and R. (Do not round intermediate calculations. Round your answers to 3 decimal places.) c. Determine the UCL and LCL for a X-chart. (Do not round intermediate calculations. Round your answers to 3 decimal places.) d. Determine the UCL and LCL for R-chart. (Leave no cells blank - be certain to enter " O " wherever required. Do not round intermediate calculations. Round your answers to 3 decimal places.) e. What comments can you make about the process? The process is in statistical control. The process is out of statistical control. Exhlbit 13.7 Factor for Determining from R the Three-Sigma Control Limits for X - and R-Charts Upper control limit for R=UCLR=D4R Lower control limit for R=LCLR=D3R