"Mexican" and "Guatemalan" are nationalities, not definitions of race. Michael Jackson, Edward James Olmos or Lucy Liu aren't American by your definition. Besides, Mexicans and Guatemalans alike can be of white, mestizo, Amerindian or many other races (see related questions).
The person in question would be American, of Mexican and Guatemalan origin.
In Mexico a minor can choose which parent to live with at the age of 14.
Spain.
The address of the Peggy Wilson Elementary Parent Teacher Organization is: 18015 Kieth Harrow Blvd, Houston, TX 77084-5722
I think that is called a Mexican-American.
No, but parents do it anyway, as well as claim abduction.
No, you cannot drink alcohol in a restaurant with a parent in NSW with the persons who are under the age of 18.
A notarized affidavit from two persons who swear to the fact is usually sufficient.
Mexican.
Depends upon the persons will, relatives, non-custodial parents and the judge
Yes, from one parent and the parent and minor has to request the abortion or she can not have one.
No, it is illegal (unless it is done by the parent of a minor child).
Yes. It indicates persons who share a single parent.