What happens next in this paragraph?

How to get evidence thrown out in court
Challenge a witness's competency.
A witness is only competent to testify about an event if he has personal knowledge of it. Object to any witness who begins testifying about an event without first establishing that he observed it.
pick from the following. (1). In many cases, lawyers will not disallow the witness to testify on the stand, but they may request the witness testify on the basis of his " established familiarity with the event " or " personality characteristics. " You can present your case to the judge.. (2). Ask the witness, " what do you think about that behavior? How will you prove it? " try to document the event. You can help make notes if you have to speak to witnesses.. (3). As the witness is testifying, you or your lawyer stands up and says, " objection, your honor " and then states your grounds. Here, the grounds are " lack of personal knowledge.. (4). You can challenge the witness's competency by asking questions. For example, you can ask questions like, " which class were you in? What did you do? " also ask the witness if he or she answered rationally..
(3).