Problem 2 150pts): Consider a cylindrically shaped zone of diffusion (physically realized by the presence of a stationary diffusion medium B) of radius 7, where the diffusing species is A and the binary diffusion coefficient is (known and constant) D. Within the zone of diffusion a zero-th order homogeneous chemical reaction takes place with an unknown volumetric rate N.. The above zone of diffusion is enveloped by a layer of a specific type of material E of thickness d for which the binary diffusion coefficient of the diffusing species A in E is (known and constant) DX If the outer molar concentration value of species A of the above material layer is known and constant Cu, as is the molar concentration value at the interface between the above two diffusion zones (assuming a negligible discontinuity), calculate both: i) the volumetric rate in ii) the molar concentration value at the center of the above cylindrically shaped mass transfer system under steady state conditions