Nitrification is carried out by autotrophs (nitrifiers) that utilize ammonium (NH₄⁺) as the electron donor, oxygen as the electron acceptor, ammonium as the nitrogen source, and inorganic carbon as the carbon source. An alternative metabolism for nitrifiers can be stimulated short-term using acetate as the carbon source instead of inorganic carbon. Determine f_s⁰ (e- eq cells per e- eq donor) and Y (g cells per g NH₄⁺as N) for the each of the carbon source scenarios. Assume e = 0.6