The following equation is a 1-D oxygen diffusion equation in a vessel where the fluid velocity is u, C is a dimensionless concentration, D is the diffusion constant, and k is the reaction rate. Use a characteristic length scale L and average velocity V as parameters. A) Determine the appropriate dimensions (e.g. mass, length, time) of D and k. B) De-dimensionalize the equation using a characteristic length, L, and initial velocity, VO, of the system