Please read the question carefully it is different from other questions that used the same graph. THX

2. An alloy ingot consists of 4.2 kg of Cu and 2.8 kg of Ag. At 776C (i.e., just below the eutectic temperature). a) What is the mass fraction of the eutectic phase? (2 Marks) b) More Ag is now added to the system, until the primary a phase completely disappears. What is the minimum amount of Ag (in kg) that needs to be added for this to happen? (2 Marks) 1200 -Liquidus 1000 Liquid Solidus L R 800 779*C (TE) 3+L E G Temperature (C) B 8.0 (CP 71.9 (CR) 91.2 (CE) 600 Solvus a. 400 2006 20 40 60 80 100 (Cu) Composition (wt% Ag) (Ag) Note, round all your answers to two decimal places