Please help me out with these questions

Andre is an amateur investor who holds a small portfolio consisting of only four stocks. The stock holdings in his portfolio are shown in the following table: Percentage of Portfolio Expected Return Standard Deviation Stock Artemis Inc. 20% 8.00% 27.00% Babish & Co. 30% 14.00% 31.00% 35% 13.00% 34.00% Cornell Industries Danforth Motors 15% 5.00% 36.00% What is the expected return on Andre's stock portfolio? O 8.33% 11.10% 14.99% 16.65% Suppose each stock in Andre's portfolio has a correlation coefficient of 0.40 (p = 0.40) with each of the other stocks. The market's average standard deviation is approximately 20%, and the weighted average of the risk of the individual securities in the partially diversified four-stock portfolio is 32%. If 40 additional, randomly selected stocks with a correlation coefficient of 0.30 with the other stocks in the portfolio were added to the portfolio, what effect would this have on the portfolio's standard deviation (p)? O It would stay constant at 32%. It would gradually settle at approximately 20%. O It would decrease gradually, settling at about 0%. It would gradually settle at approximately 50%