4. Methane formation from acetate is realized under anaerobic conditions where NH4+ is the nitrogen source for bacterial cell synthesis. Acetate is the electron donor and CO2 is the electron acceptor in this bioconversion. Assuming the bacterial cell formula is C5H7NO2 and only 10% of the electrons in the substrate are transferred to the cell biomass, answer the following questions: a. Write down the electron donor and the acceptor half-reactions b. Write down the overall reaction based on one mole of acetate. c. The reaction takes place in a batch reactor, where bacteria are growing exponentially with a doubling time of 2hr. What is the specific rate of NH4+ consumption ( gNH4+/g biomass hr)