Problem \#2: a) Show that the following is a valid activity coefficient model. You may use the derivative calculator for your convenience. lnA=(B2AxA+xB)2AxB2lnB=(ABxB+xA2BxA2 b) Write an expression for GE in J/mol. c) Write an expression for Gid in J/mol. d) Write an expression for Gmix in J/mol. e) Create a plot for GE,Gid, and Gmix (all in J/mol ) vs xA at the same plot. The temperature is 75C. f) Would you expect two phases to form? Explain your