The density of gold is 193 times 103 kgm3 its atomic mass

Question

The density of gold is 19.3 × 10³ kg/m³, its atomic mass number is 197, and the Debye energy is 0.0142 eV. The Fermi level for its conduction electrons is at εf = 5.51 eV. At a temperature of 2 K, find

(a) the lattice's contribution to the molar heat capacity,

(b) the conduction electrons' contribution to the molar heat capacity.