Fact 1: A town is hosting a 3-day music festival, which will feature a rock band show by local artists for the very first time.
Fact 2: 2000 tickets have been sold for the show.
Fact 3: The ticket sale will end next Monday.
Fact 4: The organizing committee has been working for the past 10 weeks to organize this event.
If the above statements are facts, which of the statements below must also be facts?
I. A few hundred seats will remain empty during the festival.
II. The family members of the rock band performers will be present at the festival.
III. Since the preparation started 10 weeks ago, all tickets will be sold by Monday.