50% 3) The projection of the 1iquidus surface of the ternary system A-B-C is shown in Fig. 3. There are three binary compounds. The heavy lines show the phase boundaries, the light lines are isotherms, and the dashed lines delineate the compatibility triangles. a) Label the primary crystallization areas. b) Show directions of falling temperatures along all boundaries. c) Identify all invariant points and estimate their temperatures. d) What are the solidus and liquidus temperatures of the alloys designated as X,Y,Z,W, and T ? e) Which phases are present in alloy T when it is kept at 800C ? What are the compositions and relative quantities of these phases? f) Which phases will be present in alloy U at room temperature and what are the relative quantities of these phases? g) Draw an isothermal section at 1000C, and label the fields. h) Construct a vertical section through B2AB2C. i) Describe the heating path for alloy W.What is the composition of the first liquid phase, at what temperature it forms and how much liquid appears at that temperature