If you walk 1.4 km north and then 4.8 km east, what are the magnitude and direction of your resultant displacement? a - magnitude: 5 km; direction: 16.3° east of north b - magnitude: 5 km; direction: 73.7° east of north c - magnitude: 4.6 km; direction: 73.7° east of north d - magnitude: 4.6 km; direction: 16.3° east of north