If the point A(m, n) is first reflected in the x-axis and then reflected in the y-axis to the point A"(-12, -18), then the value of (2m - n) is :

1. 6

2. -6

3. -30

4. 30

If the point A(m, n) is first reflected in the y-axis and then reflected in the x-axis to the point A"(-10, 15), then the value of (m - n) is :

1. -25

2. -5

3. 5

4. 25

Which of the following points is invariant with respect to the line y = -2?

1. (2, 3)

2. (-3, 2)

3. (-2, 3)

4. (3, -2)

The coordinates of the point P(-3, 5) on reflecting on the x-axis are :

1. (3, 5)

2. (-3, -5)

3. (3, -5)

4. (-3, 5)