Potentially useful data: $D_{AB}=3\mathrm{.}0{10}^{-6}c\frac{m^2}{s},$ the diffusion

coefficient of dissolved polymer $($solute $A)$ in liquid MEK

solvent at $25C$;${}_{A,\text{s}\text{o}\text{l}\text{i}\text{d}}=1\mathrm{.}05\frac{g}{c}{m}^3,$ mass density of solid

polymer film material; $c_{As}=c_A^{**}=0\mathrm{.}04\frac{g}{c}{m}^3,$ maximum sol$-$

ubility of dissolved polymer $($solute $A)$ in MEK solvent at

Please note that we are not given the velocity in this problem and v$\_$B is the kinematic viscosity $($NOT the velocity$)$ Please state all your equations and the meaning of all variables please. Thank you