One kilogram of an alloy of 70% Pb and 30% Sn is slowly cooled from 300°C. Calculate the following: 1. Weight % of liquid and a at 250°C 2. Chemical composition of the liquid and a at 250°C 3. Weight % of the quid and a just above the eutectic temperature 4. Chemical composition of the liquid and a at just above the eutectic temperature d.