Who played Matt Hooper in 'Jaws'?

Who played John Hammond in 'Jurassic Park'? Who played Chief Martin Brody in 'Jaws'? Who played Quint in 'Jaws'? In which film is Quint a character? In which film is Matt Hooper a character? Who played Elliott in 'E.T. the Extra-Terrestrial'? In which film is Elliott a character? Who played Gertie in 'E.T. the Extra-Terrestrial'?