Eb/D#
A whole step consists of two half steps, the smallest note division excluding semitones, so one half step brings the pitch to an "A" and the second up to "B flat"
Any major scale follows the same pattern. After the first note is a whole step, then another whole step, then a half step, whole step, whole step, whole step, half step; therefore, the fourth note of a scale is two and a half steps away from the first note.
C Natural is a whole step above B flat. If you look at a piano, a half step above B Flat is B Natural, and one more half step above that is C Natural. So it's a whole step from B Flat to C Natural.
C#/Db is a half step above C.
C Natural is a whole step above B flat. If you look at a piano, a half step above B Flat is B Natural, and one more half step above that is C Natural. So it's a whole step from B Flat to C Natural.
C Natural is a whole step above B flat. If you look at a piano, a half step above B Flat is B Natural, and one more half step above that is C Natural. So it's a whole step from B Flat to C Natural.
C is one step above B
It is a note a half step above or below the original note (a sharp or flat).
C natural
A sharp.
f
The note above F can be labelled as F sharp or G flat.