5. Two planes always at a line not a point so the statement is never true.
6. Three points can be contained in one plane or mor than one plane as point can lie anywhere in the space, so this statement is sometimes true.
7. If line m lie in the plane then all the points on the line lie on the plane. So point Q which lie on the line also lies on the plane. So statement is always true.
8. The complementary angle is of 90 degree. So it form a right angle. Hence this statement is always true.
