Please provide the answer in Excel doc only

6-1. ABC, Inc., is a manufacturer of hydraulic machine tools. It has had a history leakage trouble resulting from a certain critical fitting. Twenty five samples of machined parts were selected, one per shift, and the diameters of the fitting was measured. Required: (a). Construct x-bar- and R-charts for the data. What do you observe? (b). If the regular machine operator was absent when samples 4,8,14,22 were taken, how will the results in part (a) be affected? Hint: Remove those samples and Reconstruct the charts. I've constructed the charts but not sure if the conclusion about it being within control is right