Relativistic projectile problem.
 Enterprise traveling at 0.8c as seen by external observer
 Projectile fired at 0.6c as seen by Enterprise
 Klingon vessel approaches at 0.7c in opposite direction as seen by external observer. Find:

 Projectile speed as seen by external observer
 Approach speed of Klingons as seen by Enterprise
 Projectile speed as seen from Klingon ship Go Back