When I'm told to represent a Venn diagram for $(A-B)\cup (B\cap C)$ are these two valid?
The first one:
The second one:
I don't seem to understand clearly whether an union implies having both sets "touch" each other in the diagram or if it doesn't matter at all as long as I color them red as I did in the second one.
Also, note that the exercise doesn't actually tell me if $A,B,C$ are really intersecting each other (only $A$ with $B$ and $B$ with $C$ but never $A$ with $C$), is that supposed to make a difference in the way I display the diagrams?