(1) The party and his or her attorney of record, if any, have read the claim;
(2) To the best of the knowledge, information, and belief formed after reasonable inquiry of the party or his or her attorney, the claim is well grounded in fact and is warranted by existing law or a good faith argument for the extension, modification, or reversal of existing law;
(3) The act forming the basis for the claim is not a privileged communication; and
(4) The claim is not asserted for any improper purpose such as to suppress the right of free speech or right to petition government of a person or entity, to harass, or to cause unnecessary delay or needless increase in the cost of litigation.