$7.(12$ points$)$ Consider the file CXGF$.$txt$,$ which has thousands of lines like this:

Each line has last name, first name, city, state, and zip, delimited by one or more spaces. Note that some cities have underscores instead of spaces to ensure the columns are correct.

We want a list of names only of people not in New York State in this file. It should look something like this $($with possibly hundreds of lines of output$)$:

Joshua Chan

Gregory Serrano

Nathaniel Plimpton

$($a$)$ Give a command that uses only $\backslash ($ a w k $\backslash )$ to make that list.

$($b$)$ Give a command that uses anything but awk $($grep$,$ sed, a pipeline of both or more, whatever$)$ to make that list.