Name the type of quadrilateral formed, if any, by the following points and give the reasons for your answers: A(-1, -2), B(1, 0), C(-1, 2), D(-3, 0).
a) Parallelogram, opposite sides are parallel
b) Rhombus, all sides are equal
c) Trapezium, one pair of opposite sides are parallel
d) Square, all sides are equal and angles are right angles
