Consider a situation that is similar to that in one of the video lectures, i.e., Alice observing Bob traveling from Earth to a star at a certain distance from Earth. Assume that the Lorentz factor for the relative velocity between Alice’s frame of reference (the Earth-star frame of reference) and Bob’s frame of reference (the spaceship frame of reference) has a value of 4. From Bob’s perspective, he’s at rest and he sees the star rushing toward him. The elapsed time on Bob’s clock between the time Earth passes him and the star passes him is 12 years. How much time does he observe elapse on one of Alice’s clocks?