0
The subdominant note of E-flat minor is A-flat.
The subdominant in any major scale is the fourth note. So, in C major, the subdominant is the F.
The subdominant note is D in an A major scale
The subdominant triad of Eb major is the Ab major triad.
The subdominant note in a key is the 4th. In G minor, it's C.