Let W be the work (against the sun’s gravitational force) required to transport an 80-kg person from Earth to Mars when the two planets are aligned with the sun at their minimal distance of 55.7 × 10⁶ km. Use Newton’s Universal Law of Gravity to express W as an integral and evaluate it. The sun has mass M_s = 1.99 × 10³⁰ kg, and the distance from the sun to Earth is 149.6 × 10⁶ km.