it's a process control an Instrumentation based problem please solve it

Draw the schematic representation of a system of two CSTRs in series in which a first order reaction A>B takes place. The concentration of unreacted A from the second reactor needs to be controlled. The reactant at flowrate v and inlet concentration c0 enters the first reactor and pure A at a molar flow rate m enters as a separate stream to the first reactor after being regulated by the control valve. Construct the block diagram representation and transfer function of each unit of the feedback control system. 6