$1.$ Which of the following files will not be listed using the command:

ls $[$a$-$g$]$

Group of answer choices

apple

banana

Grape

green

Dog

$2.$ What does the following command line do :

cp $/$usr$/$lib$/$tmpfiles$.$d$/$tmp$.$conf $/$etc$/$tmpfiles$.$d$/$tmp$.$conf

Group of answer choices

cleans the $/$tmp directory

updates the tmp$.$conf file

Ensures that a package update does not overwrite the original configuration file.

prepares the $/$tmp for over writes

$3.$ What environment variable contains the user name of user who logged into the shell?

Group of answer choices

$USER

$OWNER

$UID

$HOME