You have just used the process capability index (Cpk) formulas to compute the two values 2.00 and 2.50. As discussed in the textbook, which is the true value of the process capability index and what does it mean? a) 2.00; process capable Ob) 2.50; process capable Oc) 2.50; process incapable d) Cannot answer with the information provided Oe) 2.00; process incapable