so z is a 2 X 3 matrix that looks like this

z = 4 2 5

1 8 9

and covariance of z equals

cov(z) = 4.5 -9 -6

-9 18 12

-6 12 8

can someone please explain how this came to be???????????

could someone just take the values and explain it step by step for atleast the first two values then i could probably figure out the rest.

thank you very much