please watch the video and help me to answer those question:
Question 1: According to the video, how do we define risk?
Question 2: According to the video, how would the risk of a portfolio consisting of stocks from a variety of economic sectors compare to one consisting of stocks from just one sector? What is the technical finance term for this concept?
Question 3: According to the video, what is the difference between std. dev. and beta in terms of measuring risk?
Question 4: According to the video, what are some caveats associated with CAPM?
Question 5: According to the video, what is the difference between systematic and unsystematic risk? How is each type of risk impacted by holding a well-diversified portfolio?
Question 6: What is the rationale for the positive correlation between risk and expected return?
Question 7: Why is it possible to eliminate unsystematic risk in a well-diversified portfolio? Likewise, why is it not possible to eliminate systematic risk?