7. A hiker walks on three separate trails. On the first, she walks 3.25 km westward. On the second, she walks 4.75 km northward. On the third, she walks 7.00 km eastward. A) Find the magnitude of her resultant displacement. a. 3.87 km b. 6.05 km C. 9.06 km d. 15.0 km e. None of the above B) Find the direction of her resultant displacement. a. 51.7 north of east b. 63.0 north of east 75.2 north of east C. d. 80.1 north of east e. None of the above