Please write all the formulas that you used

Assignment 2-1. In a following table you have data on future rates of return of securities X,Y and Z depending on a macroeconomic situation: - Find expected rate of return and expected volatility for the portfolio VVV which consists of 30% of security X,40% of security Y and 30% of security Z - EXTRA. Calculate beta coefficients of securities X,Y and Z if stock market expected return is 7.0%