he flow characteristics of a vessel are studied by introducing a tracer into the feed stream. The following oncentration data in the exit stream is recorded. a) Plot the E(t) curve (Clean, neat and good scaled plot is needed) b) What type of injection method is used to get this data? c) Determine the fraction of material leaving the reactor that has spent between 360 and 480s in the reactor (Show that on the plot and give the final answer). d) Calculate the mean residence time