[YOKEE]

The planes P and Q are not parallel. The point A lies in P but not Q, and the point C lies in Q but not P. Construct points B in P and D in Q such that the quadrilateral ABCD satisfies the following conditions:
(1) it lies in a plane,
(2) it is convex with the vertices in the order A, B, C, D,
(3) AB is parallel to CD,
(4) AD = BC, but AD is not parallel to BC, and
(5) a circle can be inscribed in ABCD touching the sides.