At Dove's trial for theft, Mr. Wong, called by the prosecutor, testified to the following: 1) that from his apartment window, he saw thieves across the street break the window of a jewelry store, take jewelry, and leave in a car; 2) that Mrs. Wong telephoned the police and relayed to them the license number of the thieves' car as Mr. Wong looked out the window with binoculars and read it to her; 3) that he has no present memory of the number, but that immediately afterward he listened to a playback of the police tape recording giving the license number (which belongs to Dove's car) and verified that she had relayed the number accurately. Playing the tape recording for the jury would be 
proper, because it is recorded recollection.  proper, because it is a public record or report.  improper, because it is hearsay not within any exception.  improper, because Mrs. Wong lacked firsthand knowledge of the license number.