This question is all together so cannot be posted separately as you need all 3 parts for each question!

A process that produces explosion-proof fittings has an output that is normally distributed with a mean of 5.0 cm. and a standard deviation of 0.1 cm. A job is to be run that requires 200 fittings. Determine three sigma upper control limit for an x-bar chart assuming a sample size of 10. Answer: What is the lower control limit? Answer: The following is an x-bar SPC chart for this process. Based on this SPC chart, is this process in control? If not, why not? UCL an LCL Sample Select one: O a. Yes, the process is in control. All readings are between UCL and LCL b. No, there appears to be assignable causes of variation as shown by a trend within the readings O O C. No, there appears to be assignable causes of variation as shown by cycles within the readings O d. No, there appears to be assignable causes of variation as shown by a level shift within the readings O e. No, there appears to be assignable causes of variation as shown by too much dispersion within the readings O f. No, there appears to be assignable causes of variation as shown by a bias within the readings