(a)Return. The verdict shall be unanimous. It shall be returned by the jury to the trial justice in open court.(b)Several Defendants. If there are two (2) or more defendants, the jury at any time during its deliberations may return a verdict or verdicts with respect to a defendant or defendants as to whom the jury has agreed; if the jury cannot agree with respect to all, the defendant or defendants as to whom the jury does not agree may be tried again.(c)Conviction of a Lesser Included Offense. The defendant may be found guilty of an offense necessarily included in the offense charged or of an attempt to commit either the offense charged or an offense necessarily included therein if the attempt is an offense.(d)Poll of Jury. When a verdict is returned and before the jury is discharged the jury shall be polled at the request of any party or upon the court's own motion. If upon the poll there is not unanimous concurrence, the jury may be directed to retire for further deliberations or, if circumstances warrant, the jury may be discharged.(e)Special Verdict: Insanity. If a defendant raises the defense of insanity and evidence thereof is presented at the trial, the jury, if it finds the defendant not guilty on that ground, shall declare that fact in its verdict.