The first b is on the 3rd string 4th fret played with 4. The other is the open b played on the 2nd string. One of the challenges of the guitar is that the same note and pitch can by played in multiple places on the fretboard.
All this time I thought I was making music; it was making me.
2015 Steve Ganz "Solidarity"
1980 Dauphin D30
1962 Fender pre-CBS P-Bass
National Triolian Uke ca.1930
Almost as many fly rods as guitars