The earth's interior comprises three principle regions: the Core (16.4% of the earth's total volume, density= 11.2 kg/L), the Mantle (82% fo the earth's total volume, density= 4.7 kg/L), and the crust (1.6% of the earth's volume, density equals 2.5 kg/L). Determine the average density (in kg/L) of the material forming the earth's interior. Give details of work to receive good rating.