Consider an Al-25% Si alloy. (See Figure 11-19.) Determine
(a) if the alloy is hypoeutectic or hypereutectic,
(b) the composition of the first solid to form during solidification,
(c) the amounts and compositions of each phase at 578°C,
(d) the amounts and compositions of each phase at 576°C,
(e) the amounts and compositions of each microconstituent at 576°C, and
(f) the amounts and compositions of each phase at 25°C.