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Composition (at\% Ag ) a. When the first solid alloy first starts to form, calculate i. The amount (mass) of each phase ii. The chemical composition of each phase a. When the first solid alloy first starts to form, calculate i. The amount (mass) of each phase ii. The chemical composition of each phase b. At 779C+T, calculate i. The amount (mass) of each phase ii. The chemical composition (\%) of each phase c. At 779CT, calculate i. the amount (mass) of each phase ii. the chemical composition(\%) of each phase d. At 400C, calculate i. The amount (mass) of each phase ii. The chemical composition(\%) of each phase