A unit vector that is perpendicular to both a = (-3, 1, 3) and b = (-1, -3, 0) is: O V 190 -3V190 9V190 19 190 380 O (-3, -9, 10) -3V190 v190 9V190 O 190 19 190 O (9, 3, 10) O 9V190 -3V190 V190 190 190 19 Question number 10. Find a vector N that is perpendicular to the plane determined by the points P (-2, 0, 2) , @ (2, 3, -1) and R (3, 1, 0). ON = -2i - 2j - 6k ON = -8i - 6j - 6k ON = -3i - 7j - 11k ON = -5i - 5j - 15k ON = -5j - 14kFind the area of PQ R given the points P (-3, -1, 2) , Q (-2, 1, -2) and R (-2, -2, 0). O V77 2 O V77 4 77 O 16 77 O 12 O V77 Question number 12. Find the volume of the parallelepiped with the given edges. i - 3j + k, 3j - k, i + j - 2k O 10 0 6 O 15 0 8 0 5