The co-ordinates of the centroid of a triangle with vertices (-6, -3), (0, 0) and (12, -6) are :

1. (2, 3)

2. (-2, 3)

3. (2, -3)

4. (-2, -3)

Point A(3, 4) is the center of a circle. If one of its diameters has one end as (7, 8); the other end of this diameter is :

1. (1, 0)

2. (0, 1)

3. (-1, 0)

4. (0, -1)

In parallelogram ABCD, A = (6, 0), B = (12, -4) and C = (4, -4); then the co-ordinates of vertex D are :

1. (2, 0)

2. (-2, 0)

3. (0, 2)

4. (0, -2)

The point P(2, -7) is reflected in the point (0, 3); the co-ordinates of the image of point P are :

1. (2, 13)

2. (2, -13)

3. (-2, -13)

4. (-2, 13)