Are my statements correct?

Question

U={1,2,3,4,5,6,7,8}, A={1,3,5,7}, and B={4,5,6}

My statements:

A⊆B

B⊆U

Answer 1

A⊆B is clearly false, since 7 is not an element of B

B⊆U is trivially true, since U is the universe containing all sets under analysis.