Question 4:

(a)   Rotated 90 degrees clockwise about centre (0, 0)

(b)  Rotated 90 degrees anticlockwise about centre (0, 0)

(c)  Rotated 180 degrees about centre (0, 0)

(d)  Rotated 90 degrees clockwise about centre (1, 1)

(e)  Rotated 180 degrees about centre (2, 0)

(f)  Rotated 90 degrees anticlockwise about centre (1, 3)