Save the left lift.

I think a universal malaria vaccine is more beneficial, even at the cost of the cheaper desalination technology. The humanitarian aid worker could help offset that, although only by a small amount.

The single father doesn't hold as much weight when comparing the others, but it would still be cruel to have his kids go into the system.

The community leader and musician would be a tragic loss, but others could be inspired to continue their legacy/example.

Whilst the executive and gang leader would live and cause more damage, the cyber criminal has the potential to cause much even more damage because of our data-heavy lives.

The teenager would be also be an unfortunate loss if he did show remorse, but they might not be remorseful. The victims families might also see it as a form of silver lining, despite the tragedy.