[list=1][*] Move the 4 points S, T, U, and D, so that no three of which are collinear.[/*][*] Sketch line ST, and ray UD[/*][*] Sketch segment TU, and line SD[/*][*] Draw a point E between points S and T on line ST [/*][*] Sketch the ray UX opposite ray UD [/*][*] Draw a point A that is collinear to points S and D[/*][*] Sketch a line that intersects line SD at point A [/*][*] Add a point B to line XD so that B is between X and D[/*][/list]