Given the returns for two stocks with the following information, calculate the covariance of the returns for the two stocks.

Probability	Return Stock 1	Return Stock 2
				E(R) 1
0.4	9%	11%		E(R) 2
0.5	11%	8%		Cov(R1,R2)
0.1	17%	13%

What is

Covariance