9- Based on the temperature-time-transformation diagram and the schematic representations and microscopic images represented below, 1) briefly describe how a hypereutectoid steel can be transformed to pearlite, bainite and/or martensite upon cooling from lower critical temperature. (2 marks) 2) briefly describe the differences between the mechanical properties between these morphologies of iron-carbon alloy. (2 marks) 3) base on the T-T-T diagram briefly describe the processes in which martempering or austempering heat treatment operations can lead to any one of the morphologies represented in the following figures. (2 marks) Pearlite Formation Ygrain Ferrite Ce Upper Bainite Formation 20 um 20 um Crich y Upper or Feathery bainite Lower or Acicular bainte Lower Bainite Formation 000 Nucleation Growth Appearance 05 um lower bauute 05 um