Risk

What does risk mean? Briefly describe the difference between quantitative and qualitative risk analysis. Should risk be based on a true comprehensive risk assessment, or should risk be based on worst-case scenarios? Why? Finally, explain the difference between levels of analysis regarding assets or the portfolio or system-level assessment.   TEXTBOOK: Bennett, B. T. (2018). Understanding, assessing, and responding to terrorism: Protecting critical infrastructure and personnel (2nd ed.). Hoboken, NJ: John Wiley & Sons, Inc. ISBN: 9781119237785.