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3) Liquid-Liquid equilibrium (LLE) data may be used for estimation of parameters in an expression for Excess free energy (g). In particular. Equation A, B and C given below and one (*;**) data point are sufficient in principle for determination of both parameters in a two- parameter expression for g, provided of course that the equation is capable of describing LLE. The temperature dependence of the parameters may also be estimated from a set (27*.x) of solubility data as function of Temperature (T). - = 4,241 +42143 (A) 47X2 In Y1 = x3 (-4,12 + 2(421 - 412)x) (B) In 72 = x1 (421 + 2(4,2 421 x) (C) a) Use the equation when the system of both phase in equilibrium derive the following equation? 71 In = Ini (9 --- = In 1-X b) Use prate (a) x = 0.2 andx* = 0.9 determine the parameter 412 and 412 given in equations A, B and C