Final answer:
James and Kevin are not criminally liable for Mabel's death. They are criminally liable for Franco's death due to reckless driving and manslaughter. Kevin is not criminally liable for Axel's death as he may have a valid self-defense claim.
Step-by-step explanation:
a) James and Kevin are not criminally liable for Mabel's death. The death of Mabel was partially caused by improper medical treatment, which would be considered a superseding cause. In order for someone to be held criminally liable, there must be a causal connection between their actions and the result. Since the death was not directly caused by their actions, they would not be charged with any crimes in relation to Mabel's death.
b) James and Kevin are criminally liable for Franco's death; charged with reckless driving and manslaughter. James's vehicle hit Franco, resulting in his death. Reckless driving refers to operating a vehicle without reasonable caution and is considered a criminal offense. Manslaughter refers to unintentionally causing someone's death due to recklessness or negligence. Both James and Kevin can be charged with these crimes.
c) Kevin is not criminally liable for Axel's death. Axel was beating James, and Kevin defended James by using deadly force. In this scenario, Kevin may have a valid self-defense claim since he was protecting another person from harm. He would not be charged with any crimes in relation to Axel's death.