please show the work of part (a) and (b)

thanks

A liquid mixture of CCl4 et CHCl3 with xCHCl3(i/q)=0.5242 at 40C has a total vapour pressure of ptor=301.84 torr and gas-phase equilibrium composition of xCHCC3(vap)=0.6456. At the same temperature, the pure-component vapour pressures are pCHCl3=360.1 torr and pCCl4=231.34 torr, and their second virial coefficients are B2(CHCl3)=1040cm3/mol and B2(CCl4)=1464cm3/mol. (a) Use the Lewis-Randall rule to compute the fugacity coefficients for the vapours. (b) Determine the activity coefficients for the components in the solution at equilibrium by using the "convention I", but taking into consideration that vapours are real gases