Bridge and Torch Problem

Four people take 1, 2, 5, and 8 minutes to cross a narrow bridge. At most two people can cross at once, they must carry the torch, and a pair moves at the slower person's speed. Can everyone cross within 15 minutes?

Goal: move all four people to the far side.
Elapsed time 0 / 15 min
Start side 🔦 Torch
Torch is on the start side
Far side
Choose one or two people on the torch side.
Classic bridge-and-torch puzzle visualization.