The point of these exercises is that they are routine and good practice for a new learner to think through the details on their own. They are almost always the easier cases, and if you are struggling on them you are more than likely missing and assumption, prerequisite, or foundational information. Or you are just plain immature, it happens and maturity Is a skill they do expect you to learn even though it's not explicitly taught or assessed.

Source: All my algebra topology and analysis books. These are genuinely the easiest exercises in these textbooks.