Question: 10. Determine whether the closed-loop system in Figure 9.69 is stable or not, given the loop transfer function In addition, if the closed-loop system is
10. Determine whether the closed-loop system in Figure 9.69 is stable or not, given the loop transfer function
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In addition, if the closed-loop system is stable, compute the gain and phase margins.
a. Stable, G M. . = 24 dB, P M. . = 2.5°
b. Stable, G M. . = 3 dB, P M. . = 24°
c. Stable, G M. . = ∞ dB, P M. . = 60°
d. Unstable 
L(s) = G(s)G(s) = S+1 s (4s+1)
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