Q1. :- I created a git folder. Then I downloaded the smb_common zipped file and extracted it in the following git folder. Then created the workspace folder and a smb_ws folder. In the smb_ws folder, there is src folder. Then changed directory to smb_ws and run the command "catkin_make" which created the build and devel folder..

Q2. :- Launch the smb_gazebo package using commabd "roslaunch smb_gazebo smb_gazebo.launch".

Facing error in lauching smb_gazebo package. I have been trying since many days but i dont know what its showing an error on my laptop's terminal. Moreover i consulted my team mates and seniors , but still coudnt' solve it.