Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were: Sample Sample Sample Mean (in.) Range (in.) 1 7 8 2 Sample Mean (in.) 10.602 10.602 10.593 10.604 10.595 10.597 Range (in.) 0.044 0.051 0.042 0.037 0.048 0.053 3 10.603 10.605 10.595 10.601 10.603 10.606 9 10 11 12 0.021 0.058 0.039 0.038 0.054 0.061 4 5 6 For the given data, the x = 717.464 inches (round your response to four decimal places)