Examine the following diagram:

3 lines intersect a line to form 8 angles. Angles 2 and 3, 4 and 5, 1 and 4, 5 and 8, and 6 and 7 are supplementary angles.

Which angle pairs in the diagram are supplementary angles? Check all that apply.
∠3 and ∠6
∠1 and ∠4
∠5 and ∠6
∠4 and ∠5
∠6 and ∠7