1-3 [20 points] Alice leaves Earth on her 20th birthday in a space ship moving with speed Bl = 0.6 towards a planetary system 24 light-years away. She resides and explores this planetary system for 5 years. After this she returns to Earth in a hurry with a speed [32 = 0.8. 1. [5 points] How old is Alice when she lands back on Earth? 2. [5 points] What distance did Alice travel in total according to her own frame of reference? 3. [5 points] How old is her twin brother Bob when Alice return to Earth? 4. [5 points] Alice gets married during the trip at age 25 to her fellow traveler James. When Alice turns 30 years old, she gives birth to a daughter, Elise. How old is Elise when she meets her uncle Bob