16. a) Draw the Fe-C phase diagram and determine each area on diagram, and write the three phase reactions (give compositions, temperature) b) Why Iron-Carbon binary phase diagram is drawn between Fe (Iron) and FeC (Cementite)? c) Why carbon solubility of austenite is higher than that of other solid solutions? d) What is the name of special microconstituent at eutectoid composition? Please define the amounts of each phases for this composition? e) Please explain the differences between microconstituents of hypoeutectoid and hypereutectoid? Explain the effects of these differences on the final properties.