Rule 10b-5 of the securities exchange act of 1934 makes it unlawful for a cpa to engage in each of the following activities except: employ any device, scheme, or artifice to defraud omit a material fact necessary for the financial statements to present fairly financial position, results of operations, and cash flows make an untrue statements of material fact or omit a material fact necessary in order to make the statement made, in the light of the circumstances under which they were made, not misleading engage in any act, practice, or course of business to commit fraud or deceit in connection with the purchase or sale of a security