There are four people who want to cross a rickety bridge; they all begin on the same side. You have 17 minutes to get th

[answerhappygod]

There are four people who want to cross a rickety bridge; they
all begin on the same side. You have 17 minutes to get them all
across to the other side. It is night, and they have one
flashlight. A maximum of two people can cross the bridge at one
time. Any party that crosses, either one or two people, must have
the flashlight with them. The flashlight must be walked back and
forth; it cannot be thrown, for example. Person 1 takes 1 minute to
cross the bridge, person 2 takes 2 minutes, person 3 takes 5
minutes, and person 4 takes 10 minutes. A pair must walk together
at the rate of the slower person’s pace.