$1.(10$ total points$)$ The @ character has special meaning in bash.

$($a$)(5$ points$)$ Explain the meaning of $\backslash$$$*,$ @$,"\backslash$$$*",$ and $"\backslash$$@$".$

$($b$)(5$ points$)$ How about arr $[*],$ arr $[$@$],"\backslash$$arr$[*]",$ and $"\backslash$$arr $[$@$]"?$

Write your answer in a file named hw$7-$q$1.$txt$.$