Consider the following statements:
1. Adding a zero to the G(s)H(s) tends to push root locus to the left.
2. Adding a pole to the G(s)H(s) tends to push root locus to the right.
3. Complementary root locus (CRL) refers to root loci with positive K.
4. Adding a zero to the forward path transfer function reduces the maximum overshoot of the system.
Which of the above statements are correct?1
1, 2 and 3 only
2
3 and 4 only
3
1, 2 and 4 only
4
1, 2, 3 and 4