"You will no doubt bear in mind that young people such as these two have not yet fully acquired the emotional control, restraint, awareness of risk, and the ability to appreciate the consequences of their own and others' actions, which is associated with mature adults. It is also known that educational difficulties and mental health issues negatively affect the development of those adult thought processes. You will apply these considerations to your assessment of all aspects of your assessment of the acts and intentions of these defendants, considering each of them separately, and I direct you so to do."