Stocks for fumbeshi and mundashi have the following historical returns

year	fumbush	mundashi
2010	-18%	-14.5%
2011	33%	21.8%
2012	15%	30.5%
2013	-0.5%	-7.6%
2015	27%	26.3%

i) what is the average return rate of return for each stock during the period 2010 through 2015

ii) Assuming someone held a portfolio consisting of 50% of stocks fumbeshi and 50% stocks of mundashi. what would have been the realized return on the portfolio during this period