Consider the case of several species (AI... An) adsorbing on a uniform surface. K + 4 42 + A + n * * * 4* +4 K * n 4 * A n (a) Derive expressions for the fractional coverage of the surface intermediates. (b) Now, let's assume there are only 2 species that adsorb onto the surface to form surface intermediates, and that they react on the surface to form a product P. * P+2* Consider the case of low pressures, where the concentration of surface intermediates is small. Given a constant total pressure, i.e. (A1) + (A2) = constant, what should the ratio B=(A1)/(42) be to maximize the rate of the reaction?