second-order reaction. 6-19 The following concentration data expressed in mg/L were obtained from tracer studies conducted on five different reactors. For a given reactor (to be selected by the instructor), plot the tracer curve, the normalized RTD curve, and the cumulative RTD curve. Time, min Reactor 1 Reactor 2 Reactor 3 Reactor 4 Reactor 5 0 0 0 0 0 10 0 2 0 0 20 1 5.4 0 0 30 2 8.4 0.1 0 40 5.1 11.4 0.2 0 0 50 8.9 13 0.5 0 2 60 11.2 12.1 6.3 0 6.2 70 10.5 9.3 15.2 4.5 13 80 9.2 7.2 18.1 9 10.4 90 8 5.2 8.5 14.1 100 5.1 6.5 3.6 3.2 15.6 2.8 110 5 2.5 1.8 120 12.9 1.1 3.5 1.4 1.2 9.2 0.5 o in