(a) Using the empty lattice approximation, draw the electronic band structure of a bcc metal.

(b) This metal has one valence electron per unit cell. Include the Fermi energy in your drawing.

(c) $E=0$ is indicated in the plot. What is approximately the Fermi energy in electron volts if the lattice constant is $a=4.3$ Å? (You can estimate $E_F$ if you calculate the energies where the dispersion curve meets the Brillouin zone boundaries.)