help with upper control (uclx), lower control limit (lclx), and upper control limit (uclr)

AnderSet Laboratories produces rough lenses that will ultimately be ground into precision lenses for use in laboratory equipment. The company has developed the following thickness measures, based on 15 samples of four lenses that were taken when the process was under control: 3: Click the icon to view the sample data. Click the icon to view the values of the A2, D3, and 4 constants. a. X is 4.008 . (Enter your response rounded to three decimal places.) Ris 0.621. (Enter your response rounded to three decimal places.) Upper Control Limit (UCLz)=(Enter your response rounded to three decimal places.) X More Info i X More Info Minimum Maximum Sample Size N Az D3 D4 Mean (Microns) (N = 4) 3.869 4.147 4.099 3.845 3.928 3.844 3.325 4.467 3.165 5.396 4.085 4.066 3.997 3.802 4.092 3.664 3.965 4.093 3.707 3.463 3.544 2.953 3.786 2.817 5.173 4.049 3.939 3.951 3.685 4.066 3.971 4.258 4.345 3.915 4,056 4.583 3.987 5.603 4.227 6.371 4.206 4.311 4.318 3.803 4.226 2 3 4 5 6 7 8 9 10 11 1.88 1.02 0.73 0.58 0.48 0.42 0.37 0.34 0.31 0.29 0.27 0 0 0 0 0 0.08 0.14 0.18 0.22 0.26 0.28 3.27 2.57 2.28 2.11 2.00 1.92 1.86 1.82 1.78 1.74 1.72 12 Print Done Print Done