7. A taxpayer's wife died in 2021 and he has not remarried. He has two children, ages 6 and 8 , living at home. He provides all the support for his children. What is his most advantageous filing status for 2022, 2023 and 2024 ? surviving spouse, surviving spouse, head of household surviving spouse for all three years surviving spouse, surviving spouse, single head of household for all three years