please solve in detail I am very confused

Question 3 for A:C6.9H15O1.09N;B=42.7;C=0.392;D=0.149;E=0.161 The composition of a municipal wastewater can be approximated by the following chemical formula (A). The wastewater TKN was Bmg/L. This wastewater has a carbonaceous BOD5 reaction rate (kL) equal to C day 1, a Yield (Y) of Dg-ThOD biomas /gThODsubstrate, and a nitrogenous BOD5 reaction rate (kL) equal to E day 1. What are the following quantities for this solution? a. The carbonaceous and nitrogenous ThOD. For the cThOD work with the half-reaction approach, while for the nThOD you can use the conversion factor developed in class. b. The ultimate carbonaceous and nitrogenous biochemical oxygen demand (BOD or L0). c. The total BOD5 (nitrogenous plus carbonaceous) if both reactions occur at the same time