My question is part B where the ? are.... THANKS!!!

Below is annual stock return data on ABC Corp and XYZ, Inc. Year ABC XYZ 2010 9% -3% 2011 20% 0% 2012 -9% 20% 2013 3% 9% (a) Your answer is partially correct. Try again. What is the average return and standard deviation for each stock? (Round answers to 2 decimal places, e.g. 52.75.) ABC XYZ Average return 5.75 % 6.5% x X Standard deviation 10.48 || % 8.95 || % SHOW SOLUTION LINK TO TEXT LINK TO TEXT Attempts: 2 of 2 used (b) X Your answer is incorrect. Try again. What is the expected portfolio return on a portfolio comprised of i. 25% ABC and 75% XYZ? ii. 50% ABC and 50% XYZ? (Round answers to 3 decimal places, e.g. 5.275.) E(Portfolio Return) 25% ABC and 75% XYZ ??? % 50% ABC and 50% XYZ ??? %