(a) Using Routh test determine if the system shown in Figure Q6 will be stable when: G1(s) = H1(s) = 2 G2(s) = 1 2s+2 H2(s) = 3 s2+3 (b) Discuss how an appropriate Bode plot can be used to determine if the closed-loop system shown in Figure Q6 stable or not. What transfer function should be used to generate this Bode plot?