Find the length and direction (when defined) of u x v and v xu. u= - 2i + 6j - 4k, v= -i+3j -2k luxvl =(Simplify your answer.) Select the correct choice and fill in any answer boxes in your choice below. O A. The direction of u x v is i+ i + k . (Simplify your answers, including any radicals. Use integers or fractions for any numbers in the expressions.) O B. The direction of u x v is not defined. lvxu| = (Simplify your answer.) Select the correct choice and fill in any answer boxes in your choice below. O A. The direction of v xu is i+ + k. (Simplify your answers, including any radicals. Use integers or fractions for any numbers in the expressions.) O B. The direction of v x u is not defined