In the system below, the solution fed with q0 (with volumetric flow rate) and Co concentration is spent in the 1st tank at r1 speed and fed to the 2nd tank, where it is consumed at r2 speed. If we know that the flow rates remain constant, extract the expression that will show how the C2 concentration changes over time when the Co concentration is given an impulse effect. V1, V2= tank volume q = volume flow C=concentration k=rxn rate constant