Problem 1 For each of the following figures determine whether or not they can be root locus sketches. In the case that they cannot be a root locus explain why, e.g., violates symmetry, vio- lates real axis root locus rule, etc. ja s-plane jo s-plane XOXX 8. (a) (b) jo Xs-plane jo s-plane joo jo s-plane s-plane *о * Double pole (c) (d) ja s-plane jo (S) (2) (h) s-plane