In a certain town- the supermarket, the department store, and the bank are open together on one day each week.

1. Each of the three places is open precisely 4 days a week
2. On Sunday all of these places are closed.
3. None of the three places is open on three consecutive days.
4. On six consecutive days:
   • the department store was closed on the first day
   • the supermarket was closed on the second day
   • the bank was closed on the third day
   • the supermarket was closed on the fourth day
   • the department store was closed on the fifth day
   • the bank was closed on the sixth day.

On which one of these seven days do all the three places in the town remain open?