A group is in the middle of a war zone. They are escaping an advancing platoon of enemy soldiers. They have now come to a river about 75m wide and need to devise a way to get across. The river is known to be infested by crocodiles. One of the members of the group has a twisted ankle and needs to be carried. The tools at the disposal of the group are - A 100m long rope, a knife, a torch, a toothbrush, 10 cans of meat (this is the last food left for the group), a fishing rod and a gallon of drinking water. It is estimated that the advancing enemy will reach the river front in 15 min. Only the leader is aware of this. The group is asked to deal with this situation. What should be done and why?