I need help in only e and f part please show calculation and work for these two parts

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: (30.0, 40.0), (bx , - 70.0), (- 20.0, cy ), (- 80.0, - 70.0). The overall displacement of the four darts has the xy components ( - 140, - 20.0). What are (a) b, and (b) cy? What are the (c) magnitude and (d) angle (relative to the positive direction of the x-axis) of the overall displacement? If it took the crazed ant 28.0 seconds to travel the total distance, what was (e) the average speed and (f) the average velocity of the ant?\f