Answer:
To calculate the lower control limit (LCL) and center line (CL) for an X-bar chart, we need the average and standard deviation of the sample measurements. However, in the given text, the standard deviation is not provided. Without the standard deviation, it is not possible to calculate the LCL and CL accurately.
If you have the standard deviation value, please provide it so that I can assist you in calculating the LCL and CL for the X-bar chart.
Step-by-step explanation: