Answer:
These answers are correct
Explanation:
The proper way to say it is estoy because if you use the others it would be something like this
(soy) I am the cafeteria
(estoy) I am in the cafeteria
(es) I is in the cafeteria
esta is a feminine word for saying someone is something but it should not be use when speaking of yourself.
The same logic applies to both questions.
Hope I explained enough. Have a good day :D
