5) If the join of A(4,1, 2), B (5, b, 0) is parallel to the join of C(2, 1, 1), D(3, 3, -1), then b =

44) Equation of plane passing through two points (2, 3, 1), (4, -5, 3), and parallel to Y - axis, is

68) If the points (5, 2, 4), (6, -1, 2) and (8, -7, K) are collinear, then : K =

73) Equation of plane containing the points A (1, 0, 1) and B (3, 1, 2), and parallel to the line joining the origin to the point C (1, -1, 2) is

79) Four points (0, 4, 3), (-1, -5, -3), (-2, -2, 1) and (1, 1, -1) lie in the plane

80) Equation of plane passing through (-2, -2, 2), and containing the line joining the points (1, 1, 1) and (1, -1, 2), is

86) The direction Ratios of a normal to the plane passing through the points (0, 0, 1), (0, 1, 2) and (1, 2, 3) are

91) If the line joining the points P (-2, 1, -8) and Q (a, b, c) is in the direction of the vector 6i + 2j + 3k, then the respective values of a, b, c are

96) Equation of the plane passing through the points A = (2, 1, -1), B (3, 1, 2), and parallel to X - axis, is

97) If the points (3, 9, x), (-4, 4, 4), (4, 5, 1) and (0, -1, -1) are coplanar, then : x =