Which of the following statements about manipulating objects in a set is correct?

Group of answer choices

You can add an element at the position indicated by an iterator.

If you try to add an element that already exists, an exception will occur.

Elements in classes that implements the Set interface can be ordered.

If you try to remove an element that does not exist, an exception will occur.

A set iterator visits elements in the order in which the set implementation keeps them.