Can't tar to /usr/src r-s I think it that's s that got me

[iDRONEI]

idronei~/work/sed$ sudo tar xzf /usr/src/distfiles/sed_4.1.5.tar.gz
[sudo] password for idronei:
tar: /usr/src/distfiles/sed_4.1.5.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
idronei~/work/sed$

I think this isn't working because
drwxr-sr-x 2 root src /usr/src/distfiles has that group r-s setting
I have seen s=socket s=setuid
I tried to make idronei become a member of the group src but src was not an option listed.

I tried removing the tar f first then the z leaving only the x=extract. Actually the sudo above used only the x flag.

If you think I should know what Iam doing because of what Iam trying to do, you're right. However, Iam following a tutorial to learn bash. An Iam stuck on the last part 3.
source: Bash by example, Part 3 by Daniel Robbins . Level: Intermediate. I guess this means Iam not intermediate yet.

Thanks in advance to any and all who answer this one for me.