3.37 Consider the vapor-deposition experiment described in Problem 3.36. (a) Estimate the total variability in the uniformity response. (b) How much of the total variability in the uniformity response is due to the difference between positions in the reactor? (c) To what level could the variability in the uniformity response be reduced if the position-to-position variability in the reactor could be eliminated? Do you believe this is a significant reduction?