How do I remove 'untitled' partition from terminal or disk utility? I've been trying for ages but can't work out how to completely remove these two Untitled volumes(?). I've tried remove, erase, and the minus button in Disk Utility and the commands in terminal don’t make sense or seem to work .  Please find attached images. I have Catalina OS
Ok. Nothing on disk3 needs changing yet, so all the CS commands are dangerous or ineffective

What happens when you issue:

diskutil eraseVolume free free disk0s4
diskutil eraseVolume free free disk0s3


Also, please use care, if you delete the wrong 0s4 you will lose everything. Do you have a backup and internet to reinstall if you or I make a mistake?