An exoplanet is in an elliptical orbit around a distant star. At its closest approach, the exoplanet is 0.540 AU from the star a
nd has a speed of 54.0 km/s. When the exoplanet is at its farthest distance from the star of 41.0 AU, what is its speed (in km/s)? (1 AU is the average distance from the Earth to the Sun and is equal to 1.496 ✕ 1011 m. You may assume that other planets and smaller objects in the star system exert negligible forces on the exoplanet.)