Historical Realized Rates of Return You are considering an investment in either individual stocks or a portfolio of stocks. The two stocks you are researching, Stocks A and B have the following historical returns:

Year	TA	TB
2011	-17.10 %	-13.50 %
2012	32.50 %	28.40 %
2013	17.25 %	39.20 %
2014	-2.50 %	-11.70 %
2015	29.75 %	17.50 %

a)Calculate the average rate of return for each stock during the 5-year period. Round your answers to two decimal places.

b)Suppose you had held a portfolio consisting of 50% of Stock A and 50% of Stock B. What would have been the realized rate of return on the portfolio in each year? What would have been the average return on the portfolio during this period? Round your answers to two decimal places.

c) Calculate the standard deviation of returns for each stock and for the portfolio. Round your answers to two decimal places. Enter negative returns with a minus sign. **Please show calculation steps**