guys, i have question, I am single, sponsor only dad, my dad's married status is divorced, my dad his ex-spouse had a dependent child and this child is ex-spouse's full custody. I know I have to include this child's name under dependent child section in my dad's application. But as this child will not accompany and sole legal custody of ex-spouse. So at the stage of family unit number, how many should i fill in? including this child? or just me and my dad (count as 2)?