According to W. Edwards Deming, plant managers should: I. Source inputs from a limited number of suppliers Il. Maintain clear boundaries between office staff and plant employees Ill. Institute worker training that focuses on the prevention of quality problems IV. Encourage the plant-wide use of numerical quotas V. Attempt to enhance worker pride and self-esteem 11, I & IV 1, I| III & V 1, IV & V II, IV & V 1, III & V