Publicis Sapient interview question

You get an hour to prepare for a case study - and delivering your ideas on a white board. After the hour is up - you present your case to a manager. The case study was not "difficult" but rather lengthy. I did not have enough time to finish everything I would have liked to. Be prepared to get your most valid points out before diving into the details - and read the entire case study before starting. Some important information lies at the end of the case study document.