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)