For the following questions answer them individually
Which of the following methods is the strongest tool to determine the stability and the transient response of the system?
A system with characteristic equation $$s^2 + 2 s^3 + 11 s^2 + 18 s + 18 = 0$$ will have closed loop poles such that
The transfer function of a phase lead controller is $$(1 + 3Ts) / (1 + Ts)$$. The maximum value of phase provided by this controller is