Linux / Unix:

1. How many lines in the /etc/passwd file are for neither a student nor a staff member? Here's the algorithm I want you to use to solve this:

• Determine the total number of lines in the file.
• Determine the total number of student entries in the file.
• Determine the total number of staff entries in the file.
• Use arithmetic expansion with the three numbers you obtained in order to determine how many lines are for neither a student nor a staff member.

To summarize, you need four command lines, one for each of the above steps. Be sure to copy/paste all four command lines AND their output.