5. The distillation column shown in the drawing is used to distill a binary mixture. Symbols x, y, and z denote mole fractions of the more volatile component, while B, D, R and F represent molar flow rates. It is desired to control distillate composition y. Feed flow rate F is known to vary. All flow rates can be measured and manipulated with the exception of F, which can only be measured. A composition analyzer provides measurements of y. F, z COLUMN B, x 1 -D, y The known transfer functions are Y(s) 2e-20s Y(s) = 0.5e-30s = 60s +1 " with negligible valve and D(s) 95s+1' F(s) disturbance sensor dynamics: G₁ = G₁ = 1. Use the given information, a) Propose a feedforward control strategy and sketch the control & instrumentation diagram. b) Determine the feedforward controller transfer function.