Q2. Based on Fig. 2, answer the following questions: [5 marks] At composition 60 wt \% Cu: Q2.1 At what temperature does complete melting of the alloy occur? Q2.2 At what temperature does complet: solidification of the alloy occur? Q2.3 At T =1250C: a. Calculate the mass fraction of solid b. Calculate the mass fraction of the liquid. c. What is the composition of solid phase? wt%Ni wt %Cu] d. What is the composition of the liqui phase? wt\% Ni wt%Cu Instruction: Draw the tie line for your calculation. Page 2 of 6