Mucho texto and this is math
I’m Mexican it’s used as “me lo das la azúcar “ which means” will you give me the sugar “
La and lo are different things you use in Spanish
Lo is something singular because los is what u use in they form but it means “the “ that’s what it’s used for
“Los estudiantes “=“the students “ i hope I helped as much as I could
The correct subject pronoun is "usted" because it is the singular form of "you".