Solve electrical network problems

Require a logic circuit designing for the attached solution, as much help as possible please as i am lost.

The problem does not specify, what valves are a hazardous system, it is a closed system that serves no purpose as far as i can see.

I have not studied any thermofluid systems as yet, it seems too much of a jump in knowledge expected to myself. So far only studied some electrical resistors and static & dynamics!