Please provide your reasoning in support of your answer.

1) John and Mary had been married for 15 years before John died in a car accident on December 31, 2018. Mary and her son, Daze, age 27 in 2018, continued to live at home in 2018, 2019, 2020, and 2021. Daze worked part-time (earning $3,500 in each of the four years) and attended the university on a part-time basis. Mary provided more than 50% of Dazes support for all four years. What is Marys filing status for 2018, 2019, 2020, and 2021?

2) Assuming the same situation as above except that Daze earned $4,300 in each of the four years, what is Marys filing status for 2018, 2019, 2020, and 2021?