Premise:
"Market Street is home to the Edinburgh CityArt Gallery, showcasing the work of up-and-coming artists."
Hypothesis: Many currently well-known artists got their start through Market Street.

it is not possible to tell

Premise:
"You'll always meet fellow ramblers on Helvellyn who'll keep your spirits up if you begin to flag on the ascent."
Hypothesis: Helvellyn has numerous travelers that you can meet.

yes

Premise:
"And someday he'll try to push the wrong man " Don Cazar was staring ahead of him now at Drew and Shiloh."
Hypothesis: Don Cazar was looking at Drew and Shiloh.
yes