The questions below refer to the Fe-Fe3C phase diagram below. Composition (at% C) 5 10 1600 15 1538C 1 -1493C 20 25 L 1400 2500 1394C Y+L 1200 1147C 2.14 4.30 y, Austenite 2000 Temperature (C) 1000 912C Temperature (F) y + Fezc 800 1500 + 727C 0.76 600 0.022 'a, Ferrite a + Fe3C Cementite (Fe3C) 1000 6.70 400 o 1 2 3 4 5 6 (Fe) Composition (wt% C) Adapted from Binary Alloy Phase Diagrams, Vol. 1, 2nd edition, T. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH For an alloy with a composition of 1.0 wt% C slowly cooled from the complete melting temperature: At what temperature does the first solid phase form? [Choose ] At what temperature does complete solidification of the alloy occur? [Choose ] 4 6.70 hted [Choose ] 727 C wt% C) 1394C B. Massal 1147 1350 C 1493 800 C Room temperature the comp 1538 C 912 C 1470 C [Choose ]