Choose all of the two-phase material systems from the list below. (a) Solid ductile cast iron (ferrite solid solution + embedded graphite spheres)
(b) Solid sodium chloride (salt, NaCl)
(c) Liquid bronze (Cu + Sn liquid solution)
(d) Solid gray cast iron (ferrite solid solution + embedded graphite flakes)
(e) Solid aluminum featuring dissolved silicon
(f) Solid lead-tin solder (a mixture of Pb-rich and Sn-rich solid solutions)
(g) Partially melted aluminum
(h) Frozen water with trapped air bubbles
(i) Epoxy embedded with carbon fibers