Final answer:
Hal should include zero of the prize in his gross income because prizes transferred to charities are excludible.
Step-by-step explanation:
Hal should include zero of the prize in his gross income because prizes transferred to charities are excludible from taxable income. In this case, Ethan indicated that he would transfer the $25,000 prize to the local hospital, which qualifies as a charitable organization. According to the tax laws, amounts received as gifts or prizes from charitable organizations are generally excluded from gross income for tax purposes.