4.7. Show that in the vicinity of the critical point the free energy of the binary alloy may be written as - to + 2x2 fer-13(3+4)*374(2-4) *** (347) } Discuss the Landau truncation of this expression; in particular, explain at what term the series may/should be terminated. 4.7. Show that in the vicinity of the critical point the free energy of the binary alloy may be written as - to + 2x2 fer-13(3+4)*374(2-4) *** (347) } Discuss the Landau truncation of this expression; in particular, explain at what term the series may/should be terminated