Thank you Laura. I was able to identify 2 of the plants based on your response. Also, I have submitted a close up of the first plant as requested. Thank you again.

# 2 & 3 looks like a species of partridge pea (Chamaecrista). Check out C. fasiculata and C. nicstitans on the included link below and see if you have a match. Click on images to enlarge In the first photo’s plants detail aren’t clear enough to tell (to my eyes). Can you make new post with details i.e. photo taken of side view of whole plant, its base, leaves & closeup of flowers. Thank you and best wishes! https://gobotany.newenglandwild.org/species/chamaecrista/fasciculata/