A textile manufacturer wants to set up a control chart for irregularities (e.g., oil stains, shop soil, loose threads, and tears) per 100 square yards of carpet. The following data were collected from a sample of twenty 100-square-yard pieces of carpet: a. Using these data, set up a c-chart with z=3. b. Suppose that the next five samples had 15,18,12, 22, and 21 irregularities. What do you conclude