Hi Frank,
if we use only native NWC features we can't get it quite right without layers, but try this:
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Bass
|Chord|Dur:4th|Pos:-1|Opts:Stem=Up|Dur2:Half|Pos2:-1^
|Rest|Dur:4th|Opts:Stem=Up,VertOffset=6
|Marker|Pos:4
|Note|Dur:4th,Slur|Pos:-1|Opts:Stem=Up,Slur=Upward
|Note|Dur:8th,Slur|Pos:0|Opts:Stem=Up,Slur=Upward,Beam=First
|Marker|Pos:9.5
|Note|Dur:8th|Pos:1|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End
The only problem is the minim (half note) is tied to the crotchet (quarter note) on the third beat where the image suggests it should be a slur. Unfortunately we can't use a slur here without going to layering because it would only reach the rest unless we also extended the slur from the rest in which case it would join with the slur for the top voice that's covering the last 3 notes:
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Bass
|Chord|Dur:4th,Slur|Pos:-1|Opts:Stem=Up|Dur2:Half|Pos2:-1
|Rest|Dur:4th|Opts:Stem=Up,VertOffset=6
|Marker|Pos:4
|Note|Dur:4th,Slur|Pos:-1|Opts:Stem=Up,Slur=Upward
|Note|Dur:8th,Slur|Pos:0|Opts:Stem=Up,Slur=Upward,Beam=First
|Marker|Pos:9.5
|Note|Dur:8th|Pos:1|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Bass
|Chord|Dur:4th,Slur|Pos:-1|Opts:Stem=Up|Dur2:Half|Pos2:-1
|Rest|Dur:4th,Slur|Opts:Stem=Up,VertOffset=6
|Marker|Pos:4
|Note|Dur:4th,Slur|Pos:-1|Opts:Stem=Up,Slur=Upward
|Note|Dur:8th,Slur|Pos:0|Opts:Stem=Up,Slur=Upward,Beam=First
|Marker|Pos:9.5
|Note|Dur:8th|Pos:1|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End
The best fix is to use a slur.ms object:
!NoteWorthyComposerClip(2.751,Single)
|Clef|Type:Bass
|User|Slur.ms|Pos:-3|Dir:Downward|Span:3|StartOffsetY:2
|Chord|Dur:4th|Pos:-1|Opts:Stem=Up|Dur2:Half|Pos2:-1
|Rest|Dur:4th|Opts:Stem=Up,VertOffset=6
|Marker|Pos:4
|Note|Dur:4th,Slur|Pos:-1|Opts:Stem=Up,Slur=Upward
|Note|Dur:8th,Slur|Pos:0|Opts:Stem=Up,Slur=Upward,Beam=First
|Marker|Pos:9.5
|Note|Dur:8th|Pos:1|Opts:Stem=Up,Beam=End
|Bar
!NoteWorthyComposerClip-End