Question 21 - Root Locus diagram Initial research had shown that the paralysis of a patient subjected to isoflurane was given by G1(s) below. Further research by a team of young researchers has however indicated that there is in fact a slow-acting pole that is located at the origin and that the gain term is patient dependent. Draw the root locus diagram of the revised transfer function for the paralysis - isoflurane interaction model and then answer the following questions. a) Determine the limits of stability for the gain term of the revised model. b) Do you think that the revised model is correct? Substantiate your answer from the root locus diagram. G1(s)=(s2+1.15s+0.28)(0.0763)K Question 22 - Root Locus Draw the root locus diagram for the unity feedback system shown in Figure 22.1 above. Figure 22.1: unity feedback system Where: G(s)=Ks2+2s+2s+4