The coordinates are starting from the left-most and moving clockwise.
For figure I, the coordinates of its vertices are (1, 1), (2, 3), (4, 2) and (3, 0).
For figure II, the coordinates of its vertices are (0, 5), (2, 4) and (1, 2).
For figure III, the coordinates of its vertices are (1, 5), (2, 6), (3, 6), (4, 5), (4, 4), (2, 4) and (2, 5).
For figure IV, the coordinates of its vertices are (4, 3), (5, 5), (6, 3) and (5, 1).
