A control system has an unstable plant given by the transfer function
![2058_93a08e5a-fc5a-4b92-85a8-14e728eaf16c.png](https://secure.tutorsglobe.com/CMSImages/2058_93a08e5a-fc5a-4b92-85a8-14e728eaf16c.png)
By sketching root locus, discuss whether the plant can be stabilized using
(a) Proportional (P) feedback control
(b) Proportional plus derivative (PPD) control
(c) Proportional plus integral (PI) control
Are these observations intuitively clear?