QUESTION 3 Assume a production process which is in control and an associated quality variable which follows the normal distribution with u-2700 and o=200. Select from the following list all the statements which are correct in your opinion. Select only those statements you know to be correct because negative marking is applied within this question (although it is not possible to get a negative mark for the question overall). a. Two different indices are necessary to determine whether the quality of the process' output is satisfactory. b. The percentage of output meeting specifications cannot be used as a measure of the process capability, c. The natural tolerances range is between 2000 and 3300, d. If Cp>>2, this means the process output will always be of satisfactory quality. DeWe expect 99.7% of the output to be of satisfactory quality f. The range representing the natural tolerances is independent of the range representing the specifications