A: In a second contest, the three displacements given are 90.7 m , 20.0 ∘ west of north; 15.9 m straight north; and 80.1 m , 50.0 ∘ south of east. What magnitude does the winner calculate for the displacement to find the keys to the Porsche? B: What direction does the winner calculate for the displacement to find the keys to the Porsche?