Give an algorithm for generating random variables x1, x2, x3 having a multivariate distribution with means e[xi] = i, i = 1, 2, 3, and covariance matrix. also find the copula c_{x, x}\begin{pmatrix} 3 & -2 & 1\\ -2 & 5 & 3\\ 1 & 3 & 4 \end{pmatrix}