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if that's what you need.
The one constant in this progression is the open third string "G', so I'm going to assume that it is tonally centered in the "key" of G.
X: a G (major) chord without the third of the triad, but with an added 9th, that is, the open second string, which is tuned to "a" .
Y: again, a G major chord, but with the third as the lowest note.(this is called a first inversion chord) The open second string "a" is a non-essential note (an added 9th)
Z: can be interpreted in different ways, but let's assume that the lowest note "c" is the root of the chord. That makes this a sub dominant chord (C major) with a couple of added notes, namely the first and second open strings ("a" and "d" ,which form respectively a 13th and a 9th)
W: is all "D"s and "A"s, so it is clearly a "dominant" chord in the key of G. However, it has no third (F#), but rather a "sus 4", that is to say the open third string, or "G"
R: is also a "dominant" chord. It is a D7 chord with the "7th" doubled (it has two "C"s in it). It also has the open third string (G) in it, but this is a non essential "color" note.
S: is clearly a G major chord with a low D as the bass note.
If you were to map out this progression, it would simply be expressed thus: I-I-IV-V-V-I,
or tonic, tonic, sub-dominant, dominant, dominant 7, tonic.
I hope this was helpful!
:hi:
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