If X1,X2,X3, and X4 are (pairwise) uncorrelatedrandom
Chapter 7, Problem 7.45(choose chapter or problem)
If X1,X2,X3, and X4 are (pairwise) uncorrelatedrandom variables, each having mean 0 and variance1, compute the correlations of(a) X1 + X2 and X2 + X3;(b) X1 + X2 and X3 + X4.
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