A 0.17 kg hockey puck has a velocity of 1.7 m/s toward the east (the +x direction) as it slides over the frictionless surface of an ice hockey rink. What are the (a) direction and (b) magnitude of the constant net force that must act on the puck through a 0.48 s time interval to change the puck's velocity to 3.7 m/s toward the west? What are the (c) direction and (d) magnitude if, instead, the velocity is changed to 3.7 m/s toward the south? Give your directions as positive (counter clockwise) angles gauged from the +x direction.