As part of previous adventures, formerly conjoined identicaltwin, Sue, is now 13.4 years younger than her identical twin Lou.(The anniversaries of their birth are no longer the same day.) Itis Lou's turn to travel at least 0.9c. During his round trip, Louages 1 year. When he returns, Lou and Sue once again turn theirnext respective age on the same day.
a) How much does Sue age while Lou is on his trip? (There ismore than one possible answer.)
b) How fast does Lou travel (from Sue's point of view)?
