Two twins, Sam and Sue, start out together on the earth. Sue blasts off in a spaceship and then travels inertially until her clocks show that a year has passed. She then reverses her direction and travels inertially again. When she arrives back on the earth, two more years have passed (on her clocks) for a total of three. When she gets back, Sam is four years older than he was when she left. 0 a) Draw a spacetime diagram that represents the above situation while treating Sam as being at rest. 0 b) According to Sam's reference frame, when does Sue turn around? 0 c) According to Sam's reference frame, how far apart are the twins when Sue turns around? 0 d) According to Sam's reference frame, how fast does Sue go out? How fast does she come back