Correct solution needed here using proper way previously i posted this question many times on chegg but everytime i got wrong solution so correct solution needed here otherwise i will downvote.

(a) A solution with a solute concentration of 500mg/LA is passing through a bed packed (void 0.3) with the adsorbent B. Velocity of the solution through the bed is 1.5m/s. The isotherm equation between A and B under the prevailing conditions is qe=30Ce (where qc and Ce are equilibrium concentrations of the solute in the solid and the bulk respectively). The equilibrium is assumed instantaneous. (i) What will be the velocity of the concentration front through the bed? (ii) Will the velocity change, if the isotherm changes to qe=30Ce0.5. If yes, what will be the modified velocity