Hi,
I have couple questions regarding to apply green card for my parents.
1) if I take oath tomorrow, can I apply green card for my parents the day after? -Yes
assuming they are here at States already for four and half month?
2) if so, can I file I-130, I-485, 1-864 and I-131 all together?-Yes.
3) do they file separately, in other words, one set of forms for father and another set of forms for mother?-Correct. They are in two separate cases, not related to each other.