Question 1: 1. Check the stability of the system whose closed-loop transfer function is C(s) CLTF = 3 R(s) s(s+1)(s+2)+3 2. Check the stability of the system whose characteristic equation is given by: s+ (2x0.75-1.5Marks) +4s+8-0 Question II: Consider the following signal-flow graph: (1.5 Marks) Go(s) G(3) G(8) G3(s) G4(s) G5(s) G-(x) -OCs) R(s) H(s) H(s) Hy(s) Use Mason's rule to find the transfer function T- C(s) R(s)' for the system in figure 1.