Figure 37-37 shows three situations in which a starship passes Earth (the dot) and then makes a

Question:

Figure 37-37 shows three situations in which a starship passes Earth (the dot) and then makes a round trip that brings it back past Earth, each at the given Lorentz factor. As measured in the rest frame of Earth, the round-trip distances are as follows: trip 1, 2D; trip 2, 4D; trip 3, 6D. Neglecting any time needed for accelerations and in terms of D and c, find the travel times of
(a) Trip 1,
(b) Trip 2,
(c) Trip 3 as measured from the rest frame of Earth. Next, find the travel times of
(d) Trip 1,
(e) Trip 2,
(f) Trip 3 as measured from the rest frame of the starship.