A level physics electricity question(1)

For questions b I’m confused on why my working wrong. I thought the current is the same for all components in series? I assume it has something to do with the non ideal resistor but I don’t understand how that works ? And therefore how that affects my calculations?
also for the non ideal voltmeter:
-does it have it's own voltage, current and resistance values ?
-so do I just basically treat it as a normal component in a circuit for when it comes to calculations ?
(The green in from the markscheme)

Yeah for a non-ideal voltmeter, we consider it as a resistor in parallel.
For more context, an ideal voltmeter has an infinite resistance hence a non-ideal voltmeter has a smaller resistance, hence it has some current passing through it as current is inversely proportional to resistance.

Thank you for clearing that up ! So if it has a I and V does it mean it have a voltage as well ? If so does its voltage change depending on what it’s connected to ? Furthermore does its I and V values change depending on what component it’s connected parallel to ?

and just to double check it's voltage would just be whatever it's connected parallel to right ?