3. One is faced with a decision to purchase parts from three suppliers. The part you need has a specification of 15.00 0.09 mm. The SPC studies done by suppliers indicate that their processes were in statistical control with the following process parameters. Supplier 1: X-double bar 15.00 mm, and Sigma-x 0.03 mm Supplier 2: X-double bar 15.05 mm, and Sigma-x 0.022 mm Supplier 3: X-double bar 14.95 mm, and Sigma-x = 0.015 mm Which supplier would you select? Why