Show how each of the following actor models can be transformed into a feedback system by using a reorganization similar our lecture. The actors should be aggregated into a single side-by-side composite actor. p1 p2 a) X1 X2 pi p2 p3 b) x1 X2 1 X3 pi p3 p4 c) c X1 X2 p5 p6 X3 Figure 1