4. a school group travels to mt. robson provincial park in british columbia to hike the berg lake trail. from the robson river bridge, kilometre 0.0, they hike to kinney lake, kilometre 4.2, where they stop for lunch. they then trek across the suspension bridge to the campground, kilometre 10.5. the next day they hike to the shore of berg lake and camp, kilometre 19.6. on day three, they hike to the alberta/british columbia border, kilometre 21.9, and turn around and return to the campground near emperor falls, kilometre 15.0. on the final day, they walk back out to the trailhead, kilometre 0.0. what total distance did the school group hike? (this is an absolute value question)