Could someone explain to me a bit more about OW presentation interview in which a candidate is provided with lots of data to analyze and asked to do a 30-minute presentation? It looks like this requires some knowledge of data science. What kind of analytic softwares are you provided? Excel, R, etc? How much time do they provide for data analysis before the 30-min presentation? What are they looking in the quality of data analysis? What is the best way to prepare for this type of presentation case?