An ant, crazed by the sun on a hot Texas afternoon, darts over an xy plane scratched in the dirt. The x and y components of four consecutive darts are the following, all in centimeters: (-70, 40), (bx, 50), (-90, cy), (-50, -45). The overall displacement of the four darts has the xy components (-245, 125). (a) What is bx? cm (b) What is cy? cm What are the magnitude and angle (relative to the positive x axis) of the overall displacement? (c) magnitude? cm (d) direction?