On a safari, a team of naturalists sets out toward a research station located 4.63 km away in a direction 38.7 ° north of east. after traveling in a straight line for 2.13 km, they stop and discover that they have been traveling 25.9 ° north of east, because their guide misread his compass. what are (a) the magnitude and (b) the direction (as a positive angle relative to due east) of the displacement vector now required to bring the team to the research station?