Cabinets R Us Company Given the following calculated statistics from 8 samples. In each sample, the length of 4 cabinets was measured. These 4 lengths were then averaged and the ranges were found to give the following values: What is the upper control limit for the R-chart? 1.49 1.83 11.94 1.61 3.66 Cabinets R Us Company Given the following calculated statistics from 8 samples. In each sample, the length of 4 cabinets was measured. These 4 lengths were then averaged and the ranges were found to give the following values: What is the upper boundary value between Zone B and Zone C for the xbarchart? Note: the answer options are close together, so read them carefully 12.285 12.189 12.481 12.288 12.387