I've tried for like an hour with the examples I'm just so lost on this one

Problem 13-9 Resistors for electronic circuits are manufactured on a high-speed automated machine. The machine is set up to produce a large run of resistors of 1,000 ohms each. Use Exhibit 10.13. To set up the machine and to create a control chart to be used throughout the run, 15 samples were taken with four resistors in each sample. The complete list of samples and their measured values are as follows: Use three-sigma control limits. SAMPLE NUMBER 1 2 3 4 5 6 2 7 8 9 10 11 12 13 14 15 READINGS (IN OHMS) 1014 1019 976 1018 989 1009 995 984 1020 998 1012 1003 985 1014 1021 1027 976 984 996 1006 1021 982 1006 1011 983 1017 988 978 1011 971 978 1015 990 973 1002 1030 983 1002 1005 1001 1010 1001 988 1000 994 979 970 990 999 983 974 1030 1002 1008 991 980 986 1023 1006 989 a. Calculate the mean and range for the above samples. (Round "Mean" to 2 decimal places and "Range" to the nearest whole number.) Sample Number Mean Range 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 b. Determine X and R. (Round your answers to 3 decimal places.) R c. Determine the UCL and LCL for a X chart. (Round your answers to 3 decimal places.) UCL LCL d. Determine the UCL and LCL for R-chart. (Leave no cells blank - be certain to enter "O" wherever required. Round your answers to 3 decimal places.) UCL LCL e. What comments can you make about the process? The process is in statistical control. The process is out of statistical control