Find the cross products u xv and v xu for the vectors u = (3,4, - 9) and v = (1, 1, - 1). U XV= it k (Simplify your answers.) V XU= + k (Simplify your answers.)Compute |u *v| if |ul =7 and | v| = 6 and the angle between u and v is 6 luxv| =] (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.)