a∈b, b⊆c, a not ⊆ c
(in other words, the last subset symbol should have a line from top to bottom)
The Attempt at a Solution
ive tried a million things, I can't find anything that doesn't break one of the conditions
the most recent attempt is that
A, B and C are all empty sets, but that would imply that a can be an element of B. my logic is that a doesn't contain all the elements of c, because there are no elements of c
every other thing I've tried has c containing all the elements of B, but since B contains all the elements of A, i run into a logical problem.
I tried for a long time on this one, and I really need help