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 READINGS (IN OHMS) 1 986 987 1014 1001 2 994 993 973 972 3 983 1022 981 983 4 1022 989 1007 994 5 1015 988 1020 1027 6 1013 998 990 1002 7 986 998 977 1021 8 995 1026 1016 1002 9 1023 991 993 990 10 1002 1012 1008 998 11 996 987 1017 1023 12 972 1018 1005 1018 13 1007 1007 992 998 14 978 982 986 984 15 1012 1023 1001 1003 a. Calculate the mean and range for the above samples.