The open-loop transfer function of a unity feedback control system is given by G(s) = K(s + 2) / s(s2 + 2s + 2)
The centroid and angles of root locus asymptotes are respectively
1
Zero and +90°, -90°
2
-2 / 3 and +60°, -60°
3
Zero and +120°, -120°
4
-2 / 3 and +90°, -90°
5
Zero and +90°, -45°