Black keys have the same letter names as white keys, but they are qualified as being either: __________.
i. sharp (higher in pitch) or flat (lower in pitch) in relation to the adjacent black key.
ii. none of these options
iii. sharp (higher in pitch) or
iv. flat (lower in pitch) in relation to the adjacent white key
v. sharp (lower in pitch) or flat (higher in pitch) in relation to the adjacent white key.