Adidos, a shoe company has three groups of workers: non disable women workers, non disable men workers, and disable workers. The shop said that they are serving in different level but paid with the same standards. As a researcher, you want to know whether those groups have the same median salaries. The data for those 3 groups are as follows (in thousands US$) Non Disable Women Workers : 23, 41, 54, 58, 62, 66, 73, 78 :45, 55, 57, 60, 65, 70, 72 Non Disable Men Workers Disable workers : 20, 30, 34, 40, 44. Questions: a. What are the assumptions needed for using Krusukal Wallis Test? (5 points) b. Can we conclude that the three groups have equal median of salaries? Show the hypothesis steps to obtain your conclusion!