Using the data in the following$$ table, calculated the volatility$($standard deviation$)$ of a portfolio that is $70\%$ invested in stock A and $30\%$ invested in stock B$.($Questions to answer on problem: $1.$ Find average return of stock A$.2.$ Find average return for stock B$.3.$ Find the average return of the portfolio. $4.$ Find the covariance between the two stocks. $5.$ Find the variance of the returns of stock A$.6.$ Find the variance of the returns of stock B $7.$ Find the variance of the portfolio.$)$