VIDEO
TAB
A "ghost note" is a non-played note that sounds as it is muted, you can play a ghost note just touching the string on the right fret without pushing it as you would do to play the note.
Those are the 4 figures I showed in the video, more videos are coming, so subscribe my channel to support me and be sure you won't miss any video.
If you want to se where I kept those 4 exercises just click on this link
(spoiler: it is an amazon affiliated link to a book with muted grooves)