Four People, One Flashlight

The problem
4 people · 1 flashlight · cross in 17 min?12510STARTEND≤ 2 can cross at once · move at slower pace

Four people must cross a bridge at night.

  • The bridge holds at most 2 people at a time.
  • A single flashlight must travel with whoever is crossing.
  • Their crossing times are 1, 2, 5, 10 minutes. Two crossing together move at the slower person's pace.

Get everyone across in 17 minutes. Is it possible?