Andrew (39) and lacy (40) are married, and both are the parents of zach (9). they all lived together until lacy moved out on september 25. zach stayed in the home with andrew. lacy earned $42,000 during the year, and andrew earned $33,000. andrew and lacy file separate returns. all are u. s. citizens, and all of zach's support is provided by both of his parents. if each one tries to claim zach as a dependent, who is entitled to do so?