Complex Parse Query in Android -

i have these classes in parse db.

user ...

post (user pointer<_user> | images relation )

image (post pointer | image file )

follow ( user_from pointer | user_to pointer)

the questions are,

1- how list of posts images of users following. (in java android)

2- how list of posts.

3- how o list of followers.

4- example of java class of user, post, image , follow objects.

thanks