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6. Consider the Alumina (Al2O2) Silica (SiO2) phase diagram shown below. Wr\% StU2 (a) (10 points) List all the eutectic reactions that occur in this phase diagrams, indicating tempera: ture at which they occur, the phases involved and the respective concentrations of these phases. (b) (5 points) List all congruent phase transformations, including the temperatures at which they occur, the phases involved and their respective compositions. Indicate if it is an intermediate phase or an intermetallic compound. (c) (1 point) You want to make a crucible out of a mixture of Alumina and Silica, It has to withstand temperatures up to 1650C. What composition range could you use