A biker of a mass of 150kg is traveling west through New York City at 20 miles per hour to teach class. An 120kg hipster on a scooter is traveling north at 15 miles per hour, runs a red light and collides with the cyclist. They get tangled together in the collision and skid off at the angle.

a. What is the magnitude of the velocity of the combined biker/hipster after the collision?

b. What is the angle of their travel after their collision?