Question 03: Answer the following questions regarding the classical theory of electrical conduction. (a) Derive the equation for DC conductivity using the classical oscillator model. Show each and every step in the derivation. State all your assumptions and definitions in your derivation. (b) Derive the dielectric function of a metal when it is subjected to an AC voltage. (c) Prove that metals are very lossy up to ultraviolet (UV) frequencies. (d) Prove that dielectrics are very lossy below 100Hz. (d) Estimate the plasma frequency of a metal. What is it's significance? Explain briefly