I just need one of them answer all of them if your nice oh and number 2’s options are: unos una un unas i couldn’t minimize oh well.

Question 4: Un

Question 5: papitas- unas   Estado- un  Esquela- una   libros- unos

Question 6: los refrescos, las papas fritas, las galletas, las avticidades

Explanation:

4: it is a singular masculine

5: Papitas is plural femanine, estado is singular masculine, equela is singular femanine, and libros is plural masculine.

6: They just need to be plural with gustan.