Roberta (37) is married, but she lived apart from her husband, Leo, for the last three months of 2018. Roberta and Leo are not divorced or legally separated. They agree that they do not want to file a joint return. They share custody of their two children, who spend an equal amount of time with both parents. What is Roberta's most favorable and correct filing status?
1)Single
2)Married filing jointly
3)Married filing separately
4)Head of household