C-Spec, Inc., is attempting to determine whether an existing machine is capable of milling an engine part that has a key specification of 4 6 .003 inches. After a trial run on this machine, C- Spec has determined that the machine has a sample mean of 4.001 inches with a standard deviation of .002 inch.

a. Calculate the Cpk for this machine.

b. Should C- Spec use this machine to produce this part? Why?