Answer the following questions related to the diagonal properties of quadrilaterals.
(i) State the converse of the theorem: "The diagonals of a parallelogram bisect each other."
(ii) Explain, with reasons, why the converse stated in part (i) holds true for any quadrilateral satisfying its conditions.
(iii) Give one practical example where checking the bisection of diagonals helps to confirm that a four-sided frame is a parallelogram.