[SOLVED] Can't UNZIP FILE FOR SOME REASON

Here is the feedback that my machine has decided to all of a sudden start giving me when I try to unzip a file. Never did this before so now this is a new response. Frustrating to say the least as I know the commands have been downloaded as I've used them before. here is the output from my machine....

pi@mikado:~/Downloads $ unzip linux-5.11.11.tar.xz
Archive: linux-5.11.11.tar.xz
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of linux-5.11.11.tar.xz or
linux-5.11.11.tar.xz.zip, and cannot find linux-5.11.11.tar.xz.ZIP, period.
pi@mikado:~/Downloads $ tar xvzf linux-5.11.11.tar.xz

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
pi@mikado:~/Downloads $

HELP!!!