Present Tense Conjugation Help

[Jessica]

1) ¿Quién ______ (cortar) el césped?
What do you put in the blank? Which subject is it?
Is it....
yo- corto
tú- cortas
ella--V
él -corta
Ud.---^
nosotros-cortamos
nosotras--^
ellas--V
ellos-cortan
Uds.--^

2) Translate this: ¿Hace Ud. la cama todos los días?
Does it mean "Do you make your bed everyday?

3) Is this right? ¿Lavas (lavar) tú los platos?
Do you conjugate "lavar" into lavas because of the tú? I'm sure this is right, but I want to make sure.

4) Is this right? Yo paso (pasar) la aspiradora a veces.
I know that you conjugate pasar into paso because of the yo. Is that the right spelling? Or is pasar an irregular verb? I don't think it is, though.