A boy runs 18.4 blocks North, 12.9 blocks

Question

Northeast, and 19.7 blocks West.
a)Determine the length of the displacement
vector that goes from the starting point to his final position.

b)Determine the direction of the displacement vector. Use counterclockwise as the positive
angular direction, between the limits of
−180◦ and +180◦ measured from East.
Answer in units of degrees