3. Suppose starting from point A you must walk to the river shown in the picture, then cross the river on a boat to drop off a package on the other side of the river (anywhere on the other side will work), then cross the river back and walk to point B to deliver another package there. Determine the point C on the other side of the river where you need to drop off your package in order to minimize the total distance that you have to travel. A(0.4) C(2.0) River