Determine the temperature at which austenite first begins

Question

For an Fe-1.15% C alloy, determine

(a) the temperature at which austenite first begins to transform on cooling,

(b) the primary microconstituent that forms,

(c) the composition and amount of each phase present at 728°C,

(d) the composition and amount of each phase present at 726°C, and

(e) the composition and amount of each microconstituent present at 726°C.