Frank Pianki, the manager of an organic yogurt processing plant desires a quality specification with a mean of 16.0 ounces, an upper specification limit of 16.9 ounces, and a lower specification limit of 15.1 ounces. The process has a mean of 16.0 ounces and a standard deviation of 1.25 ounce. The process capability index (Cpk)= (round your response to three decimal places)