My daughter and her friend wants to see “strangers; prey at night” am I allowed to buy the tickets for them, but then leave them alone to watch it? Thanks!

As long as there's a consenting adult purchasing them. All they need is someone of age to purchase them, acknowledging that they are okay with their child and or person under their guardianship seeing the film.

Yes

I think u can buy them online and reserve the seats

I would ask management for that one