At a given temperature, a hypothetical isomorphous A-B alloy of composition 40wt% B - 60wt% A is found to be 66wt% (B) alpha phase and 34wt% liquid phase, L. If the composition of the alpha phase is 13wt% B - 87wt% A, what is the composition of the liquid phase? To visualize, graph the isomorphous phase diagram with wt% A on the x-axis.