ST-4 Stock A and Stock B have the following historical returns:

Year	Stock A's Returns	Stock B's Returns
2004	-10.00%	-3.00%
2005	18.50	21.29
2006	38.67	44.25
2007	14.33	3,67
2008	33.00	28.30

1. Calculate the average rate of return for each stock during the period 2004-2008. Assume that someone held a portfolio consisting of 50 per-cent Stock A and 50 percent Stock B. What would have been the realized rate of return on the portfolio in each year from 2004 through 2008? What would have been the average return on the portfolio during this period?
2. Calculate the standard deviation of returns for each stock and for the portfolio.
3. Looking at the annual returns data on the two stocks, would you guess that the correlation coefficient between returns on the two stocks is closer to 0.9 or to -0.9?