I'm having a very tough time understanding homomorphisms and ideals, probably because i'm very fuzzy with the concept of rings. I'm stuck on the following problem: Find all the ideals in the following rings: 1. Z 2. Z (Z subscript 7, equivalence classes of 7 i'm guessing) 3. Z 4. Z 5. Z 6. Q (set of rationals) 7. Z (this one wasn't written as a subscript, but as brackets, and "i" as the complex number i. what does that mean?) Can someone help me to understand these better? I'd really really appreciate it.