Define opinion evidence, expert witness, and nonexpert witness.

Answer all questions and please number your answers to correspond to the number of the applicable question.1. Define opinion evidence, expert witness, and nonexpert witness.2. Rule 702 of the Federal Rules of Evidence defines the conditions under which expert testimony is admissible. What is the general rule relating to the use of expert testimony?3. Under what conditions may evidence relating to testimony given at a former trial be admitted into court? When is a witness unavailable as that term relates to this hearsay exception?4. What is a dying declaration? Must a declarant actually state that he or she is aware of imminent death before the statement is admissible? In what types of cases is a dying declaration admissible?5. Federal Rule 807 provides a catch-all exception for admissibility of hearsay evidence. Do recent U.S. Supreme Court decisions tend to favor or disfavor this rule?