There are multiple change models that guide the change process when dealing with planned or emergent change including: a) Kurt Lewin Process Model b) Dunphy and Stace Contingency Model c) Kotter 8 Steps Change Model d) Pettigrew and Whipp Model As a change practitioner; Select any two of the above listed Change Models and analyse their strengths and weaknesses. What is your preferred Change Model and why? How would you ensure that the model accounts for Sustainability