Identical twins a and b are separated at birth, a staying home and b traveling at constant speed (121 13)c toward a distant star. upon arrival, b quickly turns around and travels back home at the same speed. when b arrives home, she finds that she is 32 years younger than a. (a) how old is each twin when b arrives back home? (b) how far away is the star in a's frame? (c) since a is moving from b's point of view, why can't b argue that a should be younger than b when they get back together?