Create a file named foo that contains

lines that begin with #$,/*,$ or $//$

Blank lines $--$ lines that contain nothing

lines that do NOT begin with #$,/*,$ or $//$

Derive a grep command that locates and prints all nonblank lines that don$$t begin with #$,/*,$ or $//$ in that file.

Hint: first, specify a pattern that matches lines that do begin with #$,/*,$ or $//,$ or simply blank. Then use the $$v option for grep to negate it$.$ Show ALL steps. This includes creating the file "foo" and all the steps that follow to answer the question.