(a) Suppose Betty takes off in one direction while Andy travels at the same speed but in the opposite direction. They travel an equal distance from Earth, then turn around and come back. What will Andy's, Betty's, and the Earth's clocks show? (b) If two of triplets travel in opposite directions for 5 light years and then return: (i) will they be the same age? (ii)How will their age be, compared to the triplet who stayed home?