Can you solve this logic problem?

Question

"U2" have a concert that starts in 17 minutes and they
must all cross a bridge to get there. You must help them (with
advice only) cross to the other side. All four men begin on
the same side of the bridge. It is at night and there is only one
flashlight. A maximum of two people can cross (or be on) the
bridge at one time. Any party that crosses, either 1 or 2
people, must have the flashlight with them. The flashlight
must be walked back and forth (i.e., it cannot be thrown, etc.).
Each band member walks at a different speed. A pair
must walk together at the rate of the slower man's pace:
· Bono: 1 minute to cross bridge
· Edge: 2 minutes to cross bridge
· Adam: 5 minutes to cross bridge
· Larry: 10 minutes to cross bridge
For example, if Bono and Larry walk across first, 10
minutes have elapsed when they get to the other side of the
bridge. If Larry then returns with the flashlight, a total of 20
minutes have passed and you have failed your mission.
Notes:
a) There is no trick

Answer 1

Bono & Edge cross over = 2 mins
Bono returns = 1 min (total 3mins)
Larry & Adam cross over = 10 mins (total 13 mins)
Edge returns = 2 mins (total 15 mins)
Bono and Edge cross over = 2 mins (Total 17 mins)

They are now late for the conert as they have only crossed the bridge and still have to walk to the stage LOL.

Answer 2

Bono and Edge cross -> 2 min
Bono returns -> 1 min
Larry and Adam cross -> 10 min
Edge returns -> 2 min
Bono and Edge cross -> 2 min

Total 17 min