Session 4 - Staccato bass This is a straight bar chord move from C to G at the 3rd fret. What's important here is to keep the melody going strong and clear and to do this you don't want the bass notes to ring through. Use a dampening technique to make those bass notes nice and staccato.
Session 5 - A chord riff resolving to D Now you need to let the bass ring as you play this neat A riff which resolves to D. Remember to be clear about your fingering. This tune is not difficult to play if you have this department sorted out. To expand on this principal, with any piece of fingerstyle you need to be clear on two key points:
1) Know the chord shapes the piece is based on.
2) Use fingering that allows you to play the piece smoothly.
Session 6 - 5th position G chord inversion Here's an interesting inversion of G at the 5th position that you may not have come across. It's quite a sneaky shape and again fingering is all important.
Session 7 - Bb modulation The harmony of the melody line requires you to play a Bb to C major move. You'll notice that you need to use your little finger to play the melody over the Bb chord before changing down to the standard C chord. Many people who are new to fingerstyle have a weak little finger in their fretting hand. But it's crucial to have a strong little finger for melody playing.