7. An experiment on a surface-finishing operation of an overhead cam block auxiliary drive shaft was reported by Sirvanci and Durmaz (1993). The following is an adaption of the original experiment. The part had a target value of 75 um. The three experimental factors were type of insert (A), speed in rpm (B), and feed rate in millimeters per minute (C). A 23 design was used; the (-, + levels for the factors are (#5023, #5074) for A, (800, 1000) for B, and (50, 80) for C. The surface roughness of each part was measured by a Surtronic-3 device. The design and data for this drive shaft experiment are displayed in the following table. The current setting for the surface-finishing process is insert type #5023, 780rpm and 60 mm/min. Factor Run Ins2 A B C Roughness y 54.6 73 139.2 55.4 52.6 74.96 7.21 2 + 86.2 66.2 79.2 86 82.6 80.04 4.22 3 + 41.4 51.2 42.6 58.6 58.4 50.44 4.23 4 + + 62.8 64.8 74.6 74.6 64.6 68.28 3.52 5 + 59.6 52.8 55.2 61 61 57.92 2.63 6 + 82 72.8 76.6 73.4 75 75.96 2.61 7 + + 43.4 49 48.6 49.6 55.2 49.16 2.86 8 + + + 65.6 65 64.2 60.8 77.4 66.6 3.69 Calculate the 7 factorial effects for location y and dispersion Ins?, including main effects, two-way and three-way interaction effects