Utilize the following information and table to answer Questions 4-7. As part of the process for improving the quality of their cars, engineers of Wildcat Motors have identified a potential improvement to the process that makes a washer that is used in the accelerator assembly. The tolerances on the thickness of the washer are fairly large since the fit can be loose, but if it does happen to get too large, it can cause the accelerator to bind and create a potential problem for the driver. Let's assume that as a first step to improving the process, a sample of 40 washers coming from the machine that produces the washers was taken and the thickness measured in millimeters. The following table has the measurements from the sample: Sample 1 19 2 2 2.2 2.4 2 3 1.9 2.1 2.2 24 4 1.8 2.2 2.1 1.7 Observation 5 6 2.2 1.7 19 1.8 2. 1 2 2.2 2 7 2 2.1 1.8 1.6 8 1.9 1.6 1.7 2 9 1.7 1.8 1.9 2.1 10 1.8 1.6 1.9 2.2 2.1 NN Q4. What is the UCL for X-bar chart? 1.761 1.780 1.963 2.164