How a Low-Risk Trading Area Caused a $7.2 Billion Loss

i need an appropriate introduction relevant to project title. and then the answers to the following questions. Using auditing standards or your textbook, define the following control-related terms: [a] Control environment [b] Segregation of duties [c] Restricted access [d] Preventative and detective controls [e] Design and operating effectiveness [2] The term “tone at the top” is typically associated with a firm’s control environment. How would you characterize Société Générale’s tone at the top and what effect do you believe that had on oversight at the trading-desk level? Also I need a relevant and recent reference. I need reference in the text and also in the last page.