B C D E F G Design specifications require that a key dimension on a product measure 102 15 units. A process being considered for producing this product has a standard deviation of 6 units. (Format answers rounded to 4 decimal places when entering answers in the quiz, Leave the probabilty as decimal numbers, not %.) a) Find the process capability index, Cpk, and the probability of defective output. Assume that the process is centered with respect to specifications, i.e., process mean is 102. b) Suppose the process mean shifts to 96. Calculate the new process capability index. c) What is the probability of defective output after the process shift? Did it increase or decrease? (For this question and the next, a relevant reference is Example 13.1 in the textbook, pp. 370-371. The Excel calculation of that example is shown in the last sheet of Excel SPC.xlsx.)