A spaceship moving at 0.95c travels from the Earth to the star Alpha Centauri, which is 4.5 light years away. How long will the trip take according to the Earth clocks and the spaceship clocks respectively? Note that one light year is the distance traveled by light in one year.
(a) Earth clock: 2.5 × 10⁸ s; spaceship clock: 2.5 × 10⁸ s
(b) Earth clock: 3.6 × 10⁷ s; spaceship clock: 1.5 × 10⁸ s
(c) Earth clock: 1.5 × 10⁶ s; spaceship clock: 1.5 × 10⁶ s
(d) Earth clock: 4.8 × 10⁸ s; spaceship clock: 1.5 × 10⁸ s
(e) Earth clock: 4.7 × 10⁷ s; spaceship clock: 1.5 × 10⁸ s