a,b, and c would help a lot, thank you

Set up a stoichiometric table for each of the following reactions and express the concentration of each species in the reaction as a function of conversion, evaluating all constants ( e.g., ,). Next, assume the reaction follows an elementary rate law, and write the reaction rate solely as a function of conversion, i.e., rA=f(X). (a) For the liquid-phase reaction the entering concentrations of ethylene oxide and water, after mixing the inlet streams, are 16.13mol/dm3 and 55.5mol/dm3, respectively. The specific reaction rate is k=0.1dm3/mols at 300K with E=12,500cal/mol. (1) After finding rA=f(X), calculate the CSTR space-time, , for 90% conversion at 300K and also at 350K. (2) If the volumetric flow rate is 200 liters per second, what are the corresponding reactor volumes? (b) For the isothermal, isobaric gas-phase pyrolysis C2H6C2H4+H2 pure ethane enters the flow reactor at 6atm and 1100K, write rA=f(X). How would your equation for the concentration and reaction rate, i.e., rA=f(X), change if the reaction were to be carried out in a constant-volume batch reactor? (c) For the isothermal, isobaric, catalytic gas-phase oxidation the feed enters a PBR at 6 atm and 260C and is a stoichiometric mixture of only oxygen and ethylene