Etre verbs that can use avoir with a direct object

Question 1

How to tell if there’s a direct object?

Answer 1

The direct object is right next to the verbs (maybe seperated by an article)
Ex. J’ai sorti la voiture

Question 2

What etre verbs change to avoir when followed by a direct object?

Answer 2

Monter, descendre, sortir, rentrer, retourner, passer