Suppose two asteroids strike head on. Asteroid A (m A = 7.5 X 10 12 kg) has velocity 3.3km/s before.

Suppose two asteroids strike head on.
Asteroid A (mA = 7.5 X 1012kg) has velocity 3.3km/s
before the collision, and asteroid B (mB = 1.45 X 1013kg)
has velocity 1.4 km/s before the collision in the opposite direction. If the
asteroids stick together, what is the velocity (magnitude and direction) of the
new asteroid after the collision?