Defendant requests your Honor to charge the jury that if there is a reasonable doubt in the minds of the jury as to whether the act charged in the indictment was committed by the defendant while he was unable to discern between right and wrong, or if the evidence is equally balanced as to this, so that the jury cannot safely and conscientiously determine whether the killing of the deceased was intentional, or was committed by the defendant while he was unable to discern between right and wrong with respect to the act, then this defendant is entitled to the benefit of that doubt and entitled to an acquittal. XXIV Defendant requests your Honor to charge the jury that if it finds that the defendant is of a mental age of under twelve years, he is presumed to be incapable of the commission of crime. (_Refused_) XXV Defendant requests your Honor to charge the jury that if it finds that the defendant is of a mental age of under twelve years, he is presumed to be incapable of crime and that presumption is not removed by proof that he had sufficient capacity to understand the act charged against him and know its wrongfulness, except by evidence that satisfied the jury beyond a reasonable doubt. (_Refused_) XXVI Defendant requests your Honor to charge that if the jury finds that the defendant is of a mental age of under twelve years, the evidence that he understood the nature or quality of the act charged against him and knew its wrongfulness must be strong and clear beyond a reasonable doubt. XXVII Defendant requests your Honor to charge the jury that it must find that the understanding of and the capacity for committing a crime is measured not by the chronological years of the defendant, but by the strength of the defendant's understanding and judgment. (_Refused_) XXVIII Defendant requests your Honor to charge that if the jury find that the defendant was of a mental age of under twelve years, he was incapable of committing the crime charged in the indictment, unless the commonwealth has made strong, clear, and convincing proof beyond a reasonable doubt that the defendant was capable of discerning the difference between right and wrong or knew the quality and nature of his act. (_Refused_) XXIX Defendant requests your Honor to charge that the burden is upon the commonwealth to show that the defendant has intelligence and maturity of judgment sufficient to render him capable of harboring a criminal intent. XXX Defendant requests your Honor to charge that if no motive has been established for the crime, the jury must regard it as important in its bearing upon the question of the defendant's mental condition at the time of the commission of the act charged against him. XXXI