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1 Start with internal energy U = U(S, V, N) as a basis function for a ternary mixture which is composed of the components A, B, and C 1.1 Find y3), which is called G' from the above basis function, then express the function, in term of derivatives of function A (Helmholtz free energy) G 1.1 Express all the possible functions to define the stability criteria and stability limits of this system 1.3 Define the critical state criteria of this system in term of derivative of Gibbs energies