A Fastener Company Produces a Certain Type of Bolt for the Automobile

A fastener company produces a certain type of bolt for the automobile industry with a nominal (target) length of 2.00 inches.The specifications for the length of the bolt are 2.00 $\pm$ .006 inches.An automobile manufacturing company will only purchase from this company if the sigma level of capability of the process is at least 4.If the process mean is equal to 2.001,determine the maximum process standard deviation necessary for the fastener manufacturing company in order to qualify as a supplier for the automobile manufacturing company.

A) .0125
B) .005
C) .00125
D) .00025