A process is in control with a normally distributed output distribution with mean 1,000 and standard deviation

Question:

A process is in control with a normally distributed output with mean 1,000 and standard deviation 100. The USL and LSL for the process are 1,020 and 980, respectively.
a. Assuming no changes in the behavior of the process, what percentage of the output will be unacceptable?
b. Find and interpret the Cp value of the process.
Distribution
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