Eight arrows M, O, Q, S, U, W, X and Z are plotted around a square layout, but not necessarily in the same order.
One arrow is plotted at each corner pointing towards the centre while one arrow is plotted along each edge pointing away from the centre of the layout.
S is plotted immediate to the right of U.
Two arrows are plotted between M and U (either from the left or right side of U).
Three arrows are plotted between M and X.

One arrow is plotted between O and W.
Four arrows are plotted between Q and W (either from the left or right side of W).

Either two or five arrows are plotted between S and Z, when counted in the clockwise direction from S. Thus, case 2 is invalid.
Therefore, the final arrangement is:

Arrow W is plotted immediate to the right of the arrow M.