Which of the following potential dependents fails the support test to be claimed as a qualifying child?

Blake (18) is unmarried and worked full-time. She saved all of her income. She lived with her parents all year and they provided all of her support.

Devan (18) is unmarried and worked full-time. He had significant income and paid more than half of his own support. He lived with his mother all year.

Nova (16) lived with her brother Sam (26) all year. She had no income. Sam provided all of her support.

Xavier (23) is unmarried and attended school nine months of the year. He lived on campus for those nine months and with his parents during school breaks. He worked part-time and earned $7,400. He did not provide more than half of his own support.