An enzyme is uniformly dissolved in a spherical droplet of liquid, which is immersed in a second immiscible liquid. The droplet remains spherical, and no flow is induced inside it$.$ In the surrounding liquid there is a dissolved species that is sparingly soluble in the droplet and reacts with the enzyme. The kinetics of the reaction are first$-$order with respect to the molar concentration of the soluble species in the droplet. Assume that the concentration of the soluble species in the surrounding liquid is maintained at a constant level CL$.$ The equilibrium partition coefficient of the solute between the droplet and the surrounding liquidis given by a $=$ Cb$/$CL$.$ Write, but do not attempt to solve, the diffusion equation andboundary conditions from which it would be possible to solve for the steady state radial concentration distribution of the solute within the droplet. State clearly any assumptions you introduce in writing this mathematical model. Make a sketch that defines clearly any variables that appear in your model.