1,you should file I-130,I-864,I-485 ,G-325A & I-693,後麵三種是以他們名義file
2,depond on different location,check on follow website : www.uscis.gov/processing date/your city & state/I-485
3,your parents can't use B2 since they filed I-485,
unless their I-485 will be revoked,they have to apply & get I-131(AP) before their leaving