For each of the following scenarios, suggest THREE internal controls that can been used to mitigate the problem.

a- A shop assistant sold a $15,000 washing machine to a friend and altered the price to $1,500.

b- A procurement officer orders computers from a company that he partially owns.

c- An unordered supply of laser printer paper delivered to the office is accepted and paid for because the price is right. After jamming all of the laser printers, however, it becomes obvious that the bargain paper is of inferior quality.