What policies or procedures would you recommend to prevent each of the following activities? Explain how the risk would be avoided. A purchasing agent prepares a check for goods received from a fictitious supplier. She sends the check to her mother's post office box. The bookkeeper at a construction company has each of the three owners sign a paycheck for her. Each check is drawn from a separate account of the company. A clerk in the accounts receivable department steals $250 in cash from a customer payment and then prepares a computer credit memo that reduces the customer's account balance by the same amount. A clerk in the human relations department creates a fictitious employee in the personnel computer file. When this employee's payroll check is received for distribution, the cleric takes and cashes it. An accounts receivable clerk manages to embezzle more than $1 million from the company by diligently lapping the accounts every day for 3 consecutive years. A computer virus on the company's local area network is traced to an individual who accidentally introduced it when he loaded a computer game into his microcomputer. A hacker manages to break into a company's computer system by guessing the password of his friend, which is the name of his friend's dog. A clerk at a medical lab recognizes the name of an acquaintance as one of those whose lab tests are "positive" for an infectious disease. She mentions it to a mutual friend, and before log the entire town knows about it