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1. After keeping Cu-30wt%Ag at 1200C, it was kept at 900C for a long time, which achieved equilibrium state. Read the composition (wt%) of all possible phases at this equilibrium from the Cu-Ag binary phase diagram below. In addition, based on those values, find the values in at% (Show the calculation process) Composition (at % Ag) 20 40 60 80 1200 100 2200 A 2000 -Liquidus 1000 Liquid 1800 F Solidus a + L 1600 800 779C (TE) E B 8.0 (C) 71.9 BUL G 91.2 CE B Temperature (C) 1400 (Cp) Temperature (F) 1200 600 1000 Solvus a + B 800 400 c 600 H 12 200 0 20 40 60 80 400 100 (Cu) Composition (wt% Ag) (Ag)