Halliday, Resnick & Walker — Vectors: Problem 14

14 You are to make four straight-line moves over a flat desert floor, starting at the origin of an xy coordinate system and ending at the xy coordinates (-140 m, 20 m). The x component and y component of your moves are the following, respectively, in meters: (20 and 60), then (\(b_x\) and -70), then (-20 and \(c_y\)), then (-60 and -70). What are (a) component \(b_x\) and (b) component \(c_y\)? What are (c) the magnitude and (d) the angle (relative to the positive direction of the x axis) of the overall displacement?