root locus related project

for a given system I need you to :
1-Plotting the root locus and deduce the BA and BI.
2- Find the range of the gain K to make the system
unstable.
3- Find the range of the gain K to make the system
underdamped.
4- Find the range of the gain K to make the system
critically damped.
5- Find the range of the gain K to make the system
overdamped.
6- Deduce the steady state error for unit step input,
unit ramp input and parabolic input
**
for a dc motor It is desired to design a controller for each transfer
functions mentioned inside the word.docx file

** Solution with steps