Illustrate the phase diagrams for the following types of systems. Label the regions and intersections of the diagrams, stating what materials are present and whether they are solid, liquid, or gas.
a. Two component, solid-liquid diagram, temperature-composition, one compound off formula AB2 that melts incongruently, negligible solid-solid solubility;
b. two-component, liquid-vapor diagram, constant temperature-composition, formation of an zoetrope at xB=0.333, complete miscibility.