Solve this qustions please :

Consider the one$-$dimensional mass transfer for a mixture of oxygen $($A$)$ and carbon dioxide $($B$)$ at $294K$

and a total pressure of $1\mathrm{.}519{10}^{5}Pa.$ From the conditions: $x_A=0\mathrm{.}4,v_A=0\mathrm{.}08\frac{m}{s}$ and $v_B=-0\mathrm{.}02\frac{m}{s}.$

Calculate the following:

a$)x_B($answer: $0\mathrm{.}6)$

b$)$ Molecular weight of the mixture in $k\frac{g}{m}ol($ans$.$: $39\mathrm{.}2)$

c$){}_{\text{m}\text{i}\text{x}\text{t}\text{u}\text{r}\text{e}},{}_A,$ and ${}_B$ in $k\frac{g}{m^3}($ans$.$: $2\mathrm{.}44,0\mathrm{.}80,1\mathrm{.}64)$

d$)c_{\text{m}\text{i}\text{x}\text{t}\text{u}\text{r}\text{e}},c_A,$ and $c_B$ in $mo\frac{l}{m^3}($ans$.$: $63,25,38)$

e$){}_A$ and ${}_B($ans$.$: $0\mathrm{.}328,0\mathrm{.}672)$

f$)v_A-v^{**}$ and $v_B-v^{**}$ in $\frac{m}{s}($ans$.$: $0\mathrm{.}0672,-0\mathrm{.}0328)$

g$)v_A-v$ and $v_B-v$ in $\frac{m}{s}($ans$.$: $0\mathrm{.}0603,-0\mathrm{.}0397)$

h$)N_A,N_B,$ and $(N_A+N_B)$ in $mo\frac{l}{m^2}.$s $($ans$.$: $2,-0\mathrm{.}76,1\mathrm{.}24)$

i$)n_A,n_B,$ and $(n_A+n_B)$ in $mo\frac{l}{m^2}.s($ans$.$: $0\mathrm{.}064,-0\mathrm{.}0334,0\mathrm{.}0306)$

j$)J_B,$ in $mo\frac{l}{m^2}.$s $($ans$.$: $-0\mathrm{.}0538)$

k$)j_B,$ in $mo\frac{l}{m^2}.$s $($ans$.$: $-1\mathrm{.}51)$