Determine the number of personal and dependency exemptions in each of the following independent situations.
a. Reginald, a U.S. citizen and resident, contributes 100% of the support of his parents, who are citizens of Canada and live there.
b. Pablo, a U.S. citizen and resident, contributes 100% of the support of his parents, who are citizens of Panama. Pablo's father is a resident of Panama, and his mother is a legal resident of the United States.
c. Gretchen, a U.S. citizen and resident, contributes 100% of the support of her parents, who are U.S. citizens but are residents of Germany.