Please provide solution and also Present a derivation of the relation , i.e., the interdiffusion coefficient in terms of the second derivative of the Gibb's free energy (against concentration).

Consider a diffusion couple with markers inserted throughout the entire interdiffusion zone, so that we can measure the velocities of markers (lattice drift velocity) not only at the original interface but also everywhere. Let Dy > D, at all concentrations. Plot qualitatively the curve of velocity of marker v to show the dependence of velocity of marker on position. marker