15.12. Given the processes in Figure Q15.12, place them in order of how much each would benefit from feedforward control for a disturbance measured by analyzer A. Explain your ranking. 0=5 0=5 0=5 T=5 T=5 AC 0=0 T=5 T=5 (a) (c) 0=5 T=50 (b) A T=5 AC T=5 (AC) (d) FIGURE Q15.12 The solid lines contribute negligible dead time.