As Measured from the Earth,a Spacecraft Is Moving at Speed

Multiple Choice

As measured from the Earth,a spacecraft is moving at speed 0.80c toward a second spacecraft moving at speed 0.60c back toward the first spacecraft.What is the speed of the first spacecraft as viewed from the second spacecraft?

A) 0.81c
B) 0.95c
C) 0.38c
D) 0.20c