For calculating questions plz show the formula

Which of the following statements is FALSE? The beta is the expected percentage change in the excess return of the market portfolio for a 1% change in the excess return of a security. O Utilities tend to be stable and highly regulated, and thus are insensitive to fluctuations in the overall market. Beta measures the sensitivity of a security to market wide risk factors. volatility measures total risk, while beta measures only systematic risk. 1 points Save Answer QUESTION 4 Which of the following statements is FALSE? The overall variability of the portfolio depends on the total co-movement of the stocks within it. Nearly half of the volatility of individual stocks can be eliminated in a large portfolio as a result of diversification. The expected return of a portfolio is equal to the weighted average expected return, but the volatility of a portfolio is less than the weighted average volatility. Each security contributes to the volatility of the portfolio according to its volatility, scaled by its covariance with the portfolio, which adjusts for the fraction of the total risk that is common to the portfolio