Solutions to 2A.4

 NOTE: None of these answers are relevant for the project!
Quick jump to part 1, exercise 7:
7) L' = 1200 km. The rest is given in the spaceship frame in mcast
10) tC = 1487.594288 km = 4.962080 ms. xC = 879.168224 km
12) L = 968.005868 km