An alien spaceship traveling at 0.540c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.710c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.140 ly from the Earth when the landing craft is launched. (i) Determine the speed of the landing craft as measured by a person on earth (ii) Determine the travel time required for the landing craft to reach the Earth as measured by a person on the earth. (iii) Determine the distance between the landing craft and the earth when the landing craft is launched as measured by the alien in the landing craft. (iv) Determine the travel time required for the landing craft to reach the Earth as measured by the alien on the landing craft.

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