If the goal of the 'unfreeze' stage of Lewin's Change Management is to communicate the change and make all stakeholders believe that the change is necessary and for the collective good, what are two KPIs that a business could use to measure the effectiveness of the 'unfreezing' stage and how could these KPIs impact the business's performance? Please include specific examples and make sure that you justify your answer with a reference or references withworkinglinks.