Answer:
This is a compound sentence made up of two independent clauses, so no comma is needed.
Explanation:
Independent clause#1:
Beatrice was unable to concentrate on her project.
Independent clause#2:
Her brother's stereo was turned up to full volume.
Both clauses are explainable on their own and do not depend on another clause.
1.Squatting
2.hobbies
3. Pick a hobby that suits you and see how far you can take it.
4. There should be a period at the end of the first paragraph instead of a question mark.