a shirt manufactorer buys cloth by the $100$ yard roll from a supplier. for setting up a control chart to manage the irregularities $($ loose threads and tears$)$ the following data were collected from a sample provided by the supplier. Determine c bar, ucl, lcl and c chart with a z$=2$ DATA: $($Sample$=1,2,3,4,5,6,7,8,9,10......$ Irregularities$=5,3,3,6,6,4,7,3,4,6)$