Q.1. A copper-nickel alloy of composition 35 wt. \% Ni-65 wt. \% Cu is slowly heated from room temperature to 1300C. (a) At what temperature does the first liquid phase form? And what are the composition and weight fraction liquid phase? (b) At point B, what are the composition and weight fraction of the both liquid and phases? (c) At what temperature does complete melting of the alloy occur? What are the composition and weight fraction of the liquid and the last solid remaining prior to complete melting? Draw the microstructures schematically for all temperatures