Find the phase compositions for the following alloys: (a) 15 wt% Sn–85 wt% Pb at 100°C (212°F) (b) 25 wt% Pb–75 wt% Mg at 425°C (800°F) (c) 85 wt% Ag–15 wt% Cu at 800°C (1470°F) (d) 55 wt% Zn–45 wt% Cu at 600°C (1110°F) (e) 1.25 kg Sn and 14 kg Pb at 200°C (390°F) (f) 7.6 lbm Cu and 144.4 lbm Zn at 600°C (1110°F) (g) 21.7 mol Mg and 35.4 mol Pb at 350°C (660°F) (h) 4.2 mol Cu and 1.1 mol Ag at 900°C (1650°F)