Find the volume of a parallelepiped if four of its eight vertices are A(0,0,0), B(3,2,0), C(0, -5,2), and D(3, -6,7). The volume of the parallelepiped with the given vertices A, B, C and D is units cubed. (Simplify your answer.) 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 (Type an exact answer, using radicals as needed.) Choose the unit vector perpendicular to plane PQR OA. 3/19 (111+ 7 + k) cr OC. (2i+j+k) 3√19 OB. 3/19 (7i+11+k) D. (1+2j-k) Ne