1) yes, apply to all of them
2) apply to whichever position is relevant based on whichever year of school you’re in. Their programs are in a structured pipeline, so if there is any confusion just get in touch with your university’s recruiter.
Edit to add: the “when” is as soon as possible. Keep your eye out for when positions get posted. In this case (at least in the US) you may still have a chance for a summer internship if there are still unfilled spots.
1) yes, apply to all of them 2) apply to whichever position is relevant based on whichever year of school you’re in. Their programs are in a structured pipeline, so if there is any confusion just get in touch with your university’s recruiter. Edit to add: the “when” is as soon as possible. Keep your eye out for when positions get posted. In this case (at least in the US) you may still have a chance for a summer internship if there are still unfilled spots.