Which of the following statements are correct for Bode plots?
1) Gain margin and phase margin can be easily determined.
2) Absolute and relative stability of only minimum-phase systems can be determined.
3) Gain margin is positive and the system is stable if the magnitude of G(jω) at phase crossover is positive
1
1, 2 and 3
2
1 and 3 only
3
1 and 2 only
4
2 and 3 only