Discuss the potential liability of Adam and Mia for the involuntary manslaughter of Ben and Dipika.

Adam and Ben were friends. They were walking by a fast-flowing river one day when they started to argue. Adam pushed Ben, who fell into the river. A passer-by pulled Ben out of the water and called an ambulance which arrived to take Ben to hospital. Ben had inhaled a large quantity of water and was unconscious.
Unfortunately, due to rush-hour traffic, the ambulance was delayed on its way to the hospital. This led to Ben’s medical treatment being delayed by 30 minutes. Ben’s condition worsened over the next week and he was placed on life support. It became apparent that he was not going to recover so the life support was removed, and Ben died shortly afterwards.
Another patient, Dipika, arrived at the hospital after suffering an allergic reaction to a bee sting. She was seen by Mia, a newly qualified doctor who realised that Dipika urgently needed a shot of adrenalin. In her rush to help, Mia accidentally injected the adrenalin into Dipika’s lung. She died a few minutes later. Had the injection been performed correctly it is almost certain that she would have survived.
Discuss the potential liability of Adam and Mia for the involuntary manslaughter of Ben and Dipika.