Question

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Answer 1

Hint: If set D is a subset of set E, then all of set D is in set E

Visually it will look like this

Answer 2

exactly, D ∩ E says "you're in BOTH set D AND set E"

that's the same as saying "you're just in set D" because all of D is in E

Answer 3

your drawing suggests that A is a subset of B

are you 100% sure that all of A is in B?

Answer 4

oops I meant B is a subset of A, got that backwards

Answer 5

either way, neither set is a subset of the other

Answer 6

so A ∩ B is looking for all numbers that are in BOTH sets at the same time

Answer 7

In other words, this overlapping region