2. A small stream with a flow rate Q=0.5m3/s experiences a spill of some dye (M=20 g) at x=0. A measurement station is located downstream at x=0.5km. The river cross sectional area perpendicular to flow is 5m2. a) Sketch the situation. b) When does the maximum dye concentration pass the measuring station? What is the maximum concentration at that point? Assume DL=0.1m2/s. c) Calculate the dye concentration at x=500m at times t1=4500s and t2=5500s. d) Sketch your results on a Concentration versus Time plot for x=500m. Comment on your results explaining why you get these results