A soft drink filling machine is set up to fill bottles with 12 ounces of soft drink. The standard deviation s is known to be 0.4 ounces. The quality control department periodically selects samples of 16 bottles and measures their contents. Assume the distribution of filling volumes is normal.

Select one:

a. The UCL is 13.2

b. The LCL is 2.58

c. The UCL is 12.3

d. The process is out of control

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