Consider the lead-tin phase diagram in textbook figure 9.8. (a) A sample of -phase lead-tin alloy forms precipitate particles at 150C. What is its composition (in wt\%)? (b) A liquid is prepared of 50wt% Sn composition. As this is cooled, at what temperature does the first solid appear? What is the composition of this solid? (c) Continuing (b), what is the composition of the last bit of the liquid to solidify? (d) At at temperature of 232C, what single phases can one observe in this system, and what compositions can they have? (e) At at temperature of 183C, what single phases can one observe in this system, and what compositions can they have? (f) The microstructure of a lead-tin alloy just below the eutectic temperature consists of primary and eutectic structures. If the mass fractions of these two microconstituents are 0.40 and 0.60 , respectively, determine the overall composition of the alloy. (g) A sample of liquid lead-tin alloy of composition 80wt%Sn is cooled until completely solidified. What microstructure is present, and what the mass fractions of the microconstituents