The dwаrf plаnet Ceres is the lаrgest оbject in the asterоid belt. Assume Ceres is spherical with a radius оf 476 km and a mass of 9.4 × 1020 kg. a. Calculate the escape velocity from the surface of Ceres. (2 points) b. Calculate the average density of Ceres in kg/m³. (3 points)