A company fills plastic bottles with 8 ounces of shampoo. The tolerance is ± 0.1 ounces. The process has a standard deviation of .02 ounces. For the following situations, calculate the Cpk and evaluate the process capability.
a. A sample has an average of quantity of 7.93 ounces.
b. A sample has an average of quantity of 7.98 ounces.
c. A sample has an average of quantity of 8.04 ounces.