2. Proeutectoid ferrite is stable below the eutectoid reaction temperature. True or False. (2 pts) 3. Adding Mg and Ce into cast iron suppress graphite formation. True or False. (2 pts) 4. The proeutectoid cementite in 1095 takes ___% of the total weight of the steel. (2 pts) 5. Ni and Cr have the same effects on the microstructure development and the mechanical property of steels. True or False. (2 pts) 6. The phase transformation mechanisms for the formation of Bainite and Martensite are the same, which results in high strength of steels with either Martensite or Bainite structure. True or False. (2 pts) 7. Referring to Slide No.24 in Chapter 9 lecture note, the Mg-Pb phase diagram is shown. If the maximum phase portion of primary MgPb is 0.75 in the observed microstructures at the room temperature, what are the initial compositions of the Mg-Pb alloys? (Show details to get 6 pts) 8. Adding Mn to low-carbon steels will expand the Austenite zone of the steels. True or False. (2 pts)