Consider a binary liquid mixture with the following two-parameter margules equation values: a12 = 1.2; a21 = 3.0. using the double-tangency method, determine if the system (defined by its margules equation parameter values) exhibit a miscibility gap (i. e., split into alpha and beta phases). if so, identify the composition of the coexisting phases. select one: a. x1alpha = 0.18, x1beta = 0.78 b. x1alpha = 0.32, x1beta = 0.94 c. x1alpha = 0.12, x1beta = 0.94 d. x1alpha = 0.45; x1beta = 0.65 e. the solution cannot split into two phases