A gas mixture at a total pressure of $200$ kPa and $295$ K contains $15\%$ H$2,45\%$ O$2$ and $40\%$ H$2$O by volume. The absolute velocities of each species are $-10$ m$/$s$,-2$ m$/$s and $12$ m$/$s respectively, all in the z direction.

Determine the mass average velocity, v and the molar average velocity v$*$ for the mixture.

For oxygen, O$2,$ evaluate the fluxes j$,$ n$,$ J$.$ N