Let XXX and YYY be random variables with correlation ρ(X,Y)=0.8\rho(X, Y) = 0.8ρ(X,Y)=0.8. If Var(X)=4Var(X) = 4Var(X)=4 and Var(Y)=9Var(Y) = 9Var(Y)=9, what is Cov(X,Y)Cov(X, Y)Cov(X,Y)?
19.219.219.2
7.27.27.2
4.84.84.8
2.42.42.4