(b) if the document is not produced, to require such organisation or person to state, to the best of his knowledge and belief, where it is.
(c) require any person to state, to the best of the person’s knowledge and belief, where any such document is to be found;
(f) to require any person to provide an explanation of any document appearing to be of the relevant kind or to state, to the best of his knowledge and belief, where it may be found;