portfolio question- pls guide question, expected, standard, returns

bodhisattva

1.      Determine the expected value and standard deviation of the returns of portfolio X and Y. Each of the two assets holds equal weights i.e. 50% each. The table below states the forecasted returns of both assets.
Year
Forecasted Returns
Asset X
Asset Y
2010
12%
16%
2011
11%
18%
2012
14%
12%
2013
16%
8%
2014
14%
10%