As the Head of Information Systems at Equity Brokerage, you maintain the computer systems which support all aspects of stock trading accounts at Equity, including access for trading purposes. Your firm is being sued by a customer who alleges trading CASE 3 Farhan is personally injured and his home is badly burned by a toaster oven that, on first use, burst into flame. With Farhan successful in an action for irregularities occurred on her account. When you testify at trial as to the identity of the person who conducted the transactions and the actions that affected the status of the account, what kind of witness are you, and what kind of evidence are you providing?