i need part d, please solve!

2) In the first-order, isothermal, aqueous-phase reaction AB, the half-life of A is 1000 s. A conversion of 90% is expected to minimize waste. It is desired to process 1000kg/h of A. The molecular weight of A is 100g/mol and the molar concentration of A is 1mol/L. (a) Determine the rate constant for the reaction together with the units. (b) If the reactor is operated as a batch reactor and it is initially charged with pure A, calculate the reactor volume required, neglecting the charge and discharge times? (c) If the reactor is to be operated as a continuous-stirred tank reactor (CSTR) with a pure A feed, calculate the required volume for the same conditions given? (d) If the batch reactor has a charge time of 3h and a discharge time of 3h, which mode of operation of the reactor will have the smallest volume? Batch or CSTR or both? Hint: Total batch time = reaction time + downtime. (e) If instead of one CSTR, five equal-sized CSTRs-in-series were to be utilized, what would be their total volume