QUESTION 7 Consider the following bivariate joint probability density function for the random vector Jx.y (x, y) (x - 4,)2 -Do 0, a, > 0, and lol + 2y132-14y - 10yz + 29)). -00 2) is the density of a bivariate normal random vector Y = ( Y Y2 ) , le, find k (6)