please show step by step solution and formula used. i'll give a thumbs up

The elementary reaction A2B is carried out in a batch reactor for 1 hour. The conversion achieved is 80% when the charge (pure A) was at 0.2M. The only purpose of this test run is to obtain the kinetic parameters of the reaction. With these, it is desired to carry out the reaction in a continuous flow reactor with a flow rate of pure A equal to 400 mol/h. a. If the reaction is in the gas phase and is to be carried out in a CSTR, what volume is needed if a conversion of 60% is desired? b. Repeat (a), but for a liquid-phase reaction. Is the result different? Explain why or why not. c. If the reaction is in the liquid phase and is to be carried out in a PFR constructed from a pipe with a diameter of 15cm, what is the total length needed