Germanium and silicon have melting points of 958 and 1430 oC, respectively, and they form a continuous solid solution (totally soluble, like Cu-Ni). Thermal analysis provides the following data: Alloy liquidus solidus (wt% Si) temp. (oC) temp. (oC) 20 1115 990 40 1227 1050 60 1315 1126 80 1370 1230 a) Carefully draw a phase diagram using the above data (preferably on graph paper), and label all the important phase regions. b) For an alloy of 40% Si at 1150oC, determine the composition of the phases (where the temperature intersects the liquids or solidus) and determine the relative amounts of the phases (Hint: use the Lever law)