One of the First Stages in Any Statistical Process Control

One of the first stages in any statistical process control program is to ascertain that the equipment utilized for an operation is inherently capable of producing within the design tolerance.For a particular lathe operation,run under controlled conditions so that no assignable causes of variation have been introduced,the outside diameter of each sampled part was measured,and the operator found that the standard deviation was 0.0075 centimeters (cm) .What is the process capability if the upper specification limit is 7.508 cm and the lower specification limit is 7.388 cm?

A) 2.67
B) 1.00
C) 0.375
D) None of the above.