G natural
The leading note of B major is A#.
The submediant is lowered (E to Eb)The mediant is lowered (A to Ab)The leading note is lowered (B to Bb)
The supertonic triad in the key of A flat major is B flat, D flat, and F natural
b flat
The leading note of g minor is F#. by the way leading note means 7th note.
B major's submediant note is g#
B flat note, C note, D note, E flat note, F note, G note, A note, B flat note.
B
The dominant note is the 5th note in the scale. In the B Major scale, F is the dominant note.
Your question doesn't make much sense. But for any scale, "do" would be the first note of the scale, which is whatever the scale is called. But for a flat major, from what it sounds like you're asking, the note would be a flat. Ex: In B flat major, "Do" is b flat.
The leading note of B major is A#.
Mi is the 3rd of the scale. In B-flat major, it's D.
In B flat major the F is a natural F. In G major the F is F sharp unless you are told otherwise.
The supertonic triad in the key of A flat major is B flat, D flat, and F natural
The submediant is lowered (E to Eb)The mediant is lowered (A to Ab)The leading note is lowered (B to Bb)
B flat major is a scale, which is a series of notes played in succesion, going up and down. The musical note B flat is just one frequency which is a semitone above A. Concert A (the most used middle A) is at 440Hz.
Relative major and minor share the same key signature but a different tonic note (a tonic note is the first note of the scale or in solfege tonic is DO). For example, D flat major has five flats in it's key signature and b flat minor has 5 flats in it's key signature; therefore, D flat major and b flat minor are relative.