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(25) Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid compostion, specify the the natur e final microstructure( in terms of microconstituents present and approxing I specimen that has been subjected to the following time-tempe . assume that the specimen begins at 760 C and that it has b n at this long enough to have achieved complete and homogeneous austenitie struct Page 2 of 5 700 500 500 Temporalum (F Temperature . C 200 100 200 10 10 (a) Rapidly cool to 350"C, hold for 1000s, and quench to room temperature (b) Rapidly cool to 500"C, hold for 6s, and quench to room temperature. (c) Rapidly cool to 600"C, hold for 1005, and quench to room temperature. (d) Rapidly cool to 600"C, hold for 6s, rapidly cool to 400*C, hold for 200s, and quench to room temperature. (e) Rapidly cool to 300"C, hold for 10s, and quench to room temperature