If you answer “must” or “cannot,” justify your answer (1–2 sentences). If you answer “may,” identify an example D1, E1 for which the given set is a subset of D1, and an example D2, E2 for which the...

If you answer “must” or “cannot,” justify your answer (1–2 sentences). If you answer “may,” identify an example D1, E1 for which the given set is a subset of D1, and an example D2, E2 for which the given set is not a subset of D2.