How to add multiple python kernel(2.7.x,3.6.x,3.7.x) to jupyterhub?

How to add multiple python kernel(2.7.x,3.6.x,3.7.x) to jupyterhub?

my default python version is 3.6.8 which is installed from python sourcefile, and i am able to run jupyter notebook. Python path: /share/apps/platform/ai/py36/3_6_8/bin/python3

But now i am trying to add 2.7.16
Python path: /share/apps/platform/ai/py27/2_7_16/bin/python

# jupyter-kernelspec list
Available kernels:
  ir         /root/.local/share/jupyter/kernels/ir
  pyspark    /share/apps/platform/ai/py36/3_6_9/share/jupyter/kernels/pyspark
  python3    /share/apps/platform/ai/py36/3_6_9/share/jupyter/kernels/python3

Please guide me to add multiple python kernels.

Regards,
Zain