A plane flies 429 km east from city A to city B in 45.0 min and then 969 km south from city B to city C in 1.40 h. For the total trip, what are the
(a) magnitude (in km) and
(b) direction of the plane's displacement, the
(c) magnitude (in km/h) and
(d) direction of its average velocity, and
(e) its average speed (in km/h)? Give your angles as positive or negative values of magnitude less than 180 degrees, measured from the +x direction (east).