Please help

4.6 Question 6 Which of the following types of risk is most likely avoided by forming a diversified portfolio? A Total risk B Systematic risk C Idiosyncratic (non-systematic) risk Which of the following events is most likely an example of non-systematic risk? A A decline in interest rates B The resignation of chef executive officer C An increase in the value of the U.S. dollar Portfolio managers, who are trying to maximize risk-adjusted returns, will seek to invest less in securities with: A Lower values for non-systematic variance B Values of non-systematic variance equal to 0 C Higlier values for non-systematic variance 4.7 Question 7 "The portfolio of a risk-free asset and a risky asset has a better risk-return tradeoff than investing in only one asset type because the correlation between the risk-free asset and the risky asset is equal to: A- B0- C1