Halley's comet, which passes around the Sun every 76 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 x 1010m and moves with a speed of 54.6 km/s. When farthest from the Sun (aphelion) it is at a distance of 6.152 x 1012m and moves with a speed of 783m/s. Find the angular momentum of Halley's comet at perihelion. (Take the mass of Halley's comet to be 9.8 x 1014kg.) Find the angular momentum of Halley's comet at aphelion.