(1) A plea of guilty which was later withdrawn;
(2) A plea of nolo contendere;
(3) Any statement made in the course of any proceedings in which a guilty plea or a plea of nolo contendere was entered and was later withdrawn, vacated, or set aside; or
(4) Any statement made in the course of plea discussions with an attorney for the prosecuting authority which does not result in a plea of guilty or which results in a plea of guilty later withdrawn, vacated, or set aside;