help to fill-up I-485

[shakira08 0]

i am helping my friend to fill-up her I-485. They came here as K1 & K2. Now my questions are as follows:

Part 1:

- do both of her and her son need I-485 forms or just one form?

- what to put in box say "current uscis status"?

- in the form she need to put in married name already,right?

- after she put the number of her I-94, there is a question on the next box like "expires on"? is it referring the I-94 date?

Part 3:

- marital status (is it referring before or present ....sorry so confusing, im scared to put wrong info)....

Part 3 on letter B:

- now filling up for her son which is K2..on the annotation, do i use same annotation on the mother?...what to put on "applying w/ you ? yes or no?

pls helppppp! i need some ideas...