5. Which of the following line is parallel to the Cartesian equation of a line 2x + 3y + 5 = 0? a) r = (-1,-1) + s(2, 3) SER c) x = 2t - 1,y = 3t-1 teR b) x = 3t- 1,y = -2t -1 teR d) r = (1, 1) + k(3, -2) KER e) None of the above 6. Which of the following is not a plane? a) r = (1, 3, 4) + s(2, -1, 2) + t(1,1,1) S, t ER b) r = (2, 4, 2) + s(1, -2, 3) + t(3,2,2) S, tER c) r = (1, 3, 4) + s(4, -4, 2) + t(-2, 2, -1) s,tER d) r = (1, 3, 4) + s(2,2, -1) + t(2,2,1) s,tER e) None of the above 7. Which of the following lines is not parallel to the other three? x -2 - 2+7 a) y+3 2 -6 b) x+1 y-7 z+11 -1 3 -2 c) x =t - 1,y= -3t + 4,z = 2t - 11 , teR d) r = (3, -5, -3) + s(2, -1, 1) SER e) None of the above 8. What value of k will make the planes m1: 2x - ky + 3z - 1 = 0 and 12: 2kx + 3y - 2z = 4 perpendicular to each other