4-String Banjo Chord Chart and Tabs in Whole Step Down Tuning

Mib+7, Mib7♯5, Mib7+5, Mib aug7
Notes: Mi♭, Sol, Si, Re♭
5,2,1,4 (4213)
5,6,7,6 (1243)
5,8,7,4 (2431)