Bella is a citizen of the Cayman Islands. Terri is a citizen of Argentina. They both work for the same company. Their jobs required them to travel to the U.S. Originally, they were needed in the U.S. for many months to help build up the company's U.S. business. Now, they travel to the U.S. less frequently. They do not have a Green Card or any special Visas.

Bella was present in the U.S. for 330 days in 2019, 210 days in 2020, and 60 days in 2021. Terri was present in the U.S. for 360 days in 2019, 300 days in 2020, and 25 days in 2021. Is Bella a U.S. resident in 2021? Is Terri a U.S. resident in 2021? Explain.