Please help

(25 pts) A spaceship has a length of 120 m, a diameter 20 m, and a mass of 3.0 x 10* kg as measured by its crew. As the spaceship moves parallel to its cylindrical axis and passes us, we measure its length as 60 m. (a) (5 pts) If an observer at rest starts a stopwatch at the same time as someone on the spaceship, how much time will have passed on the spaceship's stopwatch when the stopwatch at rest shows 30 seconds? (b) (5 pts) What is the spaceship's speed in terms of the velocity of light c? (c) (5 pts) What doe an observer at rest measure as the spaceship's diameter to be? (d) (5 pts) What does an observer at rest measure as the magnitude of the momentum of the ship? Explain your answer. (e) (b pts) Determine the ratio of the ship's kinetic energy to its total energy