These are not opinion questions. You can find lists of classic musicals in numerous sources. Question 2 has an actual answer (or at the very least you can find the answer from many critics), and question 3 is an analytical question that as a student you should be answering on your own. These aren't "opinion" questions at all.
As a teacher myself, I find it irresponsible and inappropriate to ask for answers like this on a message board. If a student of mine came back with answers culled from a message board, I would fail him for not doing his own research.
There are plenty of available resources to find the answers out. Do the research, and don't look for others to provide you with them.
Hi, Shirley Temple Pudding.