A group of fraud examiners is coordinating an investigation at a local law furm several lawyers at the firm are suspected of overbilling clients possibly creating fake client accounts and then charging the firm fir services performed for these fake cliens since you are one of the fraud examiners what are some possible investigative methods you could suggest justify your suggestions How could you use invigilation to help you determine if the overbilling occured Briefly explain how you would carry out this investigative procedure. How cou you use a vulnerability chart in preparing your investigation?