A Tracking Station on Earth Observes a Rocket Move Away

Short Answer

A tracking station on Earth observes a rocket move away at 0.370c. This rocket is designed
to launch a projectile at 0.505c relative to the rocket. What speed (in terms of the speed of
light) does the tracking station measure for the projectile if it is fired (a) straight ahead of
the rocket or (b) backward from the rocket?