A manager states that his process is really working well. Out of 1,460 parts, 1,440 were produced free of a particular defect and passed inspection. a. Calculate the defects per million opportunities (DPMO). (Round your answer to the nearest whole number.) Defects per million opportunities 13699 b. Calculate the defective rate. (Round your answer to 3 decimal places.) Defective rate % c. Based on Six-Sigma theory, how would you rate this performance?