In relation to question 23, I could use help computing the correct answer. I have the standard mean of 20.26, which based on the prior answer is correct, the sample standard deviation I have is 2.7093. The UCL I have based on that information is 28.38798 and the LCL is 12.13202. The correct answer to the question is 32.03 for the UCL and 8.49 for the UCL, please assist with any steps I might be missing.