Why has FTX collapsed?

Could you please explain the reasons behind the collapse of FTX? As a professional practitioner in the field of cryptocurrency and finance, I'm particularly interested in understanding the specific factors that led to this sudden and unexpected collapse. Was it due to mismanagement, poor governance, or perhaps a lack of transparency and regulatory oversight? Was the collapse triggered by a specific event or a series of events? I'd appreciate it if you could provide a detailed and comprehensive account of what happened, including any relevant background information and analysis.