This part shall not require disclosure of:
(1) Government records which, if disclosed, would constitute a clearly unwarranted invasion of personal privacy;
(2) Government records pertaining to the prosecution or defense of any judicial or quasi-judicial action to which the State or any county is or may be a party, to the extent that such records would not be discoverable;
(3) Government records that, by their nature, must be confidential in order for the government to avoid the frustration of a legitimate government function;
(4) Government records which, pursuant to state or federal law including an order of any state or federal court, are protected from disclosure; and
(5) Inchoate and draft working papers of legislative committees including budget worksheets and unfiled committee reports; work product; records or transcripts of an investigating committee of the legislature which are closed by rules adopted pursuant to section 21-4 and the personal files of members of the legislature.