7.3 A process consists of two stirred tanks with input q and outputs T₁ and T₂ (see Fig. E7.3). To test the hypothesis that the dynamics in each tank are basically first-order, a step change in q is made from 82 to 85 L/min, with output responses given in Table E7.3. (a) Find the transfer functions T(s)/Q'(s) and T'(s)/T(s) Assume that they are of the form K₁/(t;s + 1). (b) Calculate the model responses to the same step change in q and plot with the experimental data.