Create an environment variable named SPORT and give it the value “surfi ng”. Display the value of the variable. Start a new shell. Display the variable again to show that it was passed to the new...

Create an environment variable named SPORT and give it the value “surfi ng”. Display the value of the variable. Start a new shell. Display the variable again to show that it was passed to the new shell as part of the environment. Change the value of SPORT to “running”, and display the new value. Now quit the shell and return to the original shell. Display the value of SPORT. What do you see and why?