stuck on part c, any help would be great

The Digital Guardian Company issues policies that protect clients from downtime costs due to computer system failures. It is very important to process the policies quickly because long cycle times not only put the client at risk, they could also lose business for Digital Guardian. Management is concerned that customer service is degrading because of long cycle times, measured in days. The table contains the data from five samples, each sample consisting of eight random observations. E Click the icon to view the table with sample data. Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart. a. What is your estimate of the process average? 0 More Info The estimate of the process average is. (Enter your response rounded to two decimal places.) More Info - X 1 3 7 8 Factors for calculating three-sigma limits for the x-chart and R-chart. Sample 1 2 3 4 5 7 10 12 8 19 2 14 13 7 12 9 8 17 12 6 4 Observation (days) 4 5 6 10 10 14 13 10 14 3 11 8 15 5 8 3 15 17 11 12 12 8 15 15 8 8 6 Factor for UCL for R-Chart (D4) Size of Sample (n) 2 3 4 5 6 7 Print Done Factor for UCL and LCL for X-chart (A2) 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 Factor for LCL for R-Chart (D3) 0 0 0 0 0 0.076 0.136 0.184 0.223 3.267 2.575 2.282 2.115 2.004 1.924 1.864 1.816 1.777 8 9 10 c. Construct an R- and an x-chart for this process. Set up the R-chart by specifying the three-sigma control limits below. The UCLR equals 19.39 and the LCLR equals 1.41 . (Enter your responses rounded to two decimal places.) Set up the x-chart by specifying the three-sigma control limits below. The UCL; equals and the LCLE equals (Enter your responses rounded to two decimal places)