Suppose u={0, 1, 2, 3, 4, 5, 6}, a={2, 4, 6}, and b={1, 2, 3}. tell whether each statement is true or false. a⊆u true or false

That asks if A is a subset of U.  Since each member of A, namely 2, 4 and 6, is also in U, A is indeed a subset of U.

TRUE

answer: the answer is ann