Earth connection diagram

Hello everyone ! It is my first time on this forum so be kind :sweat_smile: !

For my school i have to create three diagram on PSIM , TN-C , TN-S and IT but i am very bad for doing this . My teacher give me one exemple and i try to do few things with that but none was good . Can i have some advice on this please , i understand the utility of this type on connection but i can’t draw it !

The example :