Question 7, 12.4.18 HW Score: 0' Part1 of 2 0 Points: 0 Homework: Section 1... Find the area of the triangle determined by the points P, Q, and R. Find a unit vector perpendicular to plane PQR . P( - 2,2, - 1), Q( - 1,0,2), R(0, - 1, - 2) The area of the triangle is E. (Type an exact answer, using radicals as needed.) Question 6, 12.4.15 > HW Score: 0%, 0 of 17 points Part 1 of? 0 Points: 0 of 1 Homework: Section 1... Find the area of the triangle determined by the points P, Q. and R. Find a unit vector perpendicular to plane PQR. P(1,-1,-2), Q(-2,0, 1), R(0,-2,1) The area of the triangle is E. (Type an exact answer, using radicals as needed.) HW Score: 0%, 0 of 17 Homework: Section 1... Question 5. 12.4.11 0 points: 0 0H Sketch the coordinate axes and then include the vectors u, v, and u xv as vectors starting at the origin. u = i +j v =j k Choose the correct answer below. 5 0A