Someone please help me with this problem!!! I can't solve problem this problem. I know it's probably very easy to solve, but I don't know why I'm stuck. Please help me break it down...thank you. The route followed by a hiker consists of three displacement vectors A, B and C. Vector A is along a measured trail and is 3100 m in a direction 20.9° north of east. Vector B is not along a measured trail, but the hiker uses a compass and knows that the direction is 43.5° east of south. Similarly, the direction of vector C is 34.9° north of west. The hiker ends up back where she started, so the resultant displacement is zero, or A + B + C = 0. Calculate the magnitude of vector B.