An automatic sensor measures the diameter of holes in consecutive order. The results of measuring 25 holes follow. Sample Diameter Sample Diameter 1 9.94 14 9.99 2 9.93 15 10.12 3 10.09 16 9.81 4 9.98 17 9.73 5 10.11 18 10.14 6 9.99 19 9.96 7 10.11 20 10.06 8 9.84 21 10.11 9 9.82 22 9.95 10 10.38 23 9.92 11 9.99 24 10.09 12 10.41 25 9.85 13 10.36 (a) Estimate the process standard deviation. (b) Set up a CUSUM control procedure, assuming that the target diameter is 10.0 millimeters. Does the process appear to be operating in a state of statistical control at the desired target level