Form 2120, Multiple Support Declaration, is used for what purpose?

If the

1. To indicate which parent is taking a minor child's dependency exemption.
2. To indicate amount of support being provided by a college student for their own support.
3. To indicate support provided by a person providing at least 10% for a qualifying relative,
4. other than a child.
5. To indicate which parent will be taking the American Opportunity Credit for a college
6. aged child.

Please select correct answer with explanation.