A 8-sided die is rolled twice let x be the sum of the two

A 8-sided die is rolled twice. Let X be the sum of the two rolls, Y be the first minus the second, and Z be the 4 times the first, minus the second.

(a) Compute Cov(X,Y):

Cov(X,Y)=

(b) Compute Cov(X,Z):

Cov(X,Z)=

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A 8-sided die is rolled twice let x be the sum of the two : a 8-sided die is rolled twice. let x be the sum of the two rolls y be the first minus the second and z be the 4 times

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