A company produces a service part for electric vehicles. Each unit is either labelled as defective or non-defective after a quality test is conducted. The parts arrive at the testing facility in boxes, with each box containing 20 units of the product. Suppose that the quality inspector have checked 8 boxes, with the number of defective units from those boxes given as follows. Boxes # of defects Box 1 Box 2 Boxes 2 Box 5 1 Box 6 Box 3 0 Box 7 Box 4 0 Box 8 What is the UCL of the p-chart with the confidence level 95%? # of defects 1 0 0 0 Notes: 1. Keep 2 decimal places for your final answer. 2. Keep at least 4 decimal places for all intermediate steps.