A gas mixture at a total pressure of 124 kPa and 328 K contains 16% H2, 21% O2, and the rest H2O by volume. The absolute velocity of each species are -5, -4, and 14 m/s, respectively, all in the direction of the z-axis. Determine (a) the mass diffusion flux of O2 and (b) the molar diffusion flux of O2