A process to be controlled has two controlled variables Y1 and Y2, and three inputs that can be used as manipulated variables, U1, U2, and U3. However, it is desired to use only two of these three manipulated variables in a conventional multiloop feedback control system. Transfer functions for the process are shown below. Which multiloop control configuration will result in the smallest amount of steady-state interaction between inputs and outputs? Justify youranswer.

Y(s) 0.5 s+ 1)6 + 3) 5)+4 35 + 2 2s +1 Ui(s) 4 Us(s) Y:(s) = -10U1(s) + (s+ 1)(3s + 1) U(s) + s+1