ow could you use a larger grid size and a longer time step? 6) What are the coefficients of your algorithm? 7) What would a negative coefficient mean?...

4) Is your model stable? 5) How could you use a larger grid size and a longer time step? 6) What are the coefficients of your algorithm? 7) What would a negative coefficient mean? 8) What type of initial and boundary conditions do you need to satisfy? 9) How do you make sure that no contaminant will numerically leak out of the upstream boundary?