A medical facility does MRls for sports injuries. Occasionally, a test yields inconclusive results and must be repeated. Using the following sample data and n=200. Click here for the Excel Data File a. Determine the upper and lower control limits for the fraction of retests using two-sigma limits. (Do not round intermediate calculations. Round your final answers to 4 decimal places. Leave no cells blank - be certain to enter " 0 " wherever required.) a. Determine the upper and lower control limits for the fraction of retests using two-sigma limits. (Do not round intermediate calculations. Round your final answers to 4 decimal places. Leave no cells blank-be certain to enter " 0 " wherever required.) b. Is the process in control? The process is in control. The process is not in control