The mean-field Flory-Huggins theory puts everything that is not understood about the thermodynamics of a mixture into the interaction parameter . For solutions of linear polystyrene in cyclohexane, is experimentally found to vary with composition and temperature as . (1) Does the polystyrene/cyclohexane system have a UCST or LCST? (2) What is the critical temperature for a very high molar mass linear polystyrene in cyclohexane with = 0.01? (3) Determine the -temperature of this system at = 0.1.