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A spaceship moves away from Earth at a speed 0.874c and fires a shuttle craft that then moves in a forward direction at 0.21c relative to the ship. The pilot of the shuttle launches a probe forward at a speed of 0.412c relative to the shuttle.

1. Determine the speed of the shuttle relative to Earth. Answer in units of c.

2. Determine the speed of the probe relative to Earth. Answer in unit sof c.

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