Galaxy A moves away from galaxy \(\mathrm{B}\) at \(0.600 c_{0}\) relative to B. A spaceship leaves a planet in galaxy A traveling at \(0.500 c_{0}\) relative to galaxy \(\mathrm{A}\). If the direction in which the ship travels is the same as the direction in which \(\mathrm{A}\) is moving away from B, what do observers in B measure for the ship's speed?