If XXX and YYY are independent, and Var(X)=2,Var(Y)=2Var(X) = 2, Var(Y) = 2Var(X)=2,Var(Y)=2, what is Cov(X+Y,X−Y)Cov(X+Y, X-Y)Cov(X+Y,X−Y)?
444
000
222
−4-4−4