Given the single factor model r = E(r) + bF + for which 340 stocks rely to generate their returns where F is a factor and b is the factor loading and is idiosyncratic error. Stock A which is one of the 340 stocks has an expected return of 7% , a factor loading of b = 0.03, a factor F with a mean of zero following a variance of 1 and a standard deviation of idiosyncratic error of 37%. These characteristics are the same for all the 340 stocks. Risk free rate is 3%. The portfolio we hold has equal weight on each stock and places nothing on the risk-free asset.

Question:What is the standard deviation of return on this portfolio and what is the covariance of the stock return with the return of the portfolio ?