7 Tones in key:               Bb, C, Db, Eb, F, Gb, Ab,      (i, iidim, IIII, iv, iv, VI, VII)
        3 Primary Chords:          Bbm, Ebm, Fm                        (i, iv, v)
        3 Secondary Chords:      Db,  Gb, Ab                            ( III, VI, VII)
        Dominant 7th Chord:      F7                                           (V7)
  Danman says..."Check out the chart"...Bb natural minor
 

Scale Step	Root	3rd	5th	Chord Type
I	Bb	Db	F	Minor
II	C	Eb	Gb	Diminished
III	Db	F	Ab	Major
IV	Eb	Gb	Bb	Minor
V	F	Ab	C	Minor
VI	Gb	Bb	Db	Major
VII	Ab	C	Eb	Major