O'Connor Distributors wants to develop a control chart to assess the quality of its polyurethane sheets. They take ten sheets of 1" thickness and compute the number of cosmetic flaws on each. Each sheet is 20' by 100'. Based on the following data, develop limits for the 99.73% control chart, and determine whether the process is in control. The number of flaws are as follows: 4, 8, 4, 16, 5, 8, 7, 7, 10, 9.

a. Which control chart should be utilized in this scenario? [ Select ] ["x-chart", "cannot determine", "Cp", "p-chart", "c-chart"]

b. What are the limits based on the data: UCL = [ Select ] ["17.25", "17.56", "16.90", "None of the choices provided are correct", "16.18"] , LCL = [ Select ] ["-.58", "None of the choices provided are correct", "1.35", ".057", "0"]

c. Is the process in control? [ Select ] ["cannot determine", "just on the lower end", "yes", "based on percentage, yes", "no"] If not, which samples are out of control?