How to sketch vector paths in a physics problem

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Homework Statement


Printed textbook problem 14: four straight-line moves over a flat desert floor from the origin to (-140 m, 20 m), with x and y components (20 and 60), (b_x and -70), (-20 and c_y), (-60 and -70) in meters, asking for b_x, c_y, and the overall displacement's magnitude and angle.


Homework Equations


N/A

The Attempt at a Solution



I tried to sketch the paths but i sill ended up blank
Handwritten sketch of displacement vectors on a grid: three numbered green arrows, labelled 1 to 4, connect points marked with coordinates including -60, -70, 60, 20 and -20, ending at a labelled point (-140, 20).
 
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Hi!
Make use of vector addition - by making use of the fact that the net change in the ##x##-direction is independent of the change in the ##y##-direction.
 
Before you attempt to draw the vectors, you need to figure out the values of bx and cy because you don't know how big they are and whether they are positive or negative. Do you know how to answer parts (a) and (b) without drawing a vector diagram? @LemmeThink gave you a hint.