Xamp y are gaussian random variables with ex1 ey2 exy1

Question

X & Y are Gaussian random variables with E[X]=1, E[Y]=2, E[XY]=.1, VAR[X]=5 & VAR[Y]=10. Define the vector V=(matrix) 1 1;1 -1 matrix X;Y. Find the mean of E[V], covariance martix for V, use matrix notation and write the density f(V) using the result from the mean and covariance martix.