4) Figure 3 shows the Fe-C phase diagram. We equilibrate a Fe-0.6% C specimen at 1000 C and subsequently slowly cool it to 726 C and hold it there for some time. Its microstructure consists of preeuiectoid ferrite and pearlite (P): (a&b) Sketch and calculate the wt% F and Cm present (c) What will happen to the microstructure if we hold the specimen at 726 C for a very long time (20)