Please explain the answer too. Thank you!!!

Make a copy of the isothermal transformation diagram for a 0.45 wt% C iron-carbon alloy (Figure 10.40), and then sketch and label on this diagram the time-temperature paths to produce the following microstructures: (a) 42% proeutectoid ferrite and 58% coarse pearlite (b) 50% fine pearlite and 50% bainite (c) 100% martensite (d) 50% martensite and 50% austenite 900 1600 800 A.F 1400 700 1200 A+ P 600 1000 500 AB Temperature (C) A Temperature (F) 400 50% 800 M(start) 300 M(50%) 600 M(90%) 200 400 100 200 0 0.1 1 10 102 103 104 105 Time (s) Adapted from Atlas of Time-Temperature Diagrams for Irons and Steels, G. F. Vander Voort (Editor) 1991. Reprinted by permission of ASM International, Materials Park, OH