problem with the diagrams of the rational unfied process

I want to verify that i correctly understand the rational unified process.

My understanding is:

1. For the requirements specification activity, i have to design the use case diagram (a general one), the class diagram (classes, attributes, relations), and a general sequence diagram.
2. For the analysis activity, i have to design a detailed use case, the sequence diagram (using control, view and model classes), the analysis class diagram, the collaboration diagram
3. For the conception diagram, i have to design the class diagram and the deploiement diagram

is that correct please?

for my questions:

1. When can i use the activity and the state-transition diagrams?
2. Is it correct to first design a class diagram in the requirement acquisition phase?
3. In the implementation phase, which diagrams do i have to use? Or do you only have to generate code from some diagrams?

thank you a lot !!

Your assumptions are right.

1. ADs are used to illustrate scenarios from a use case. State transitions are usually created for classes. The can be used in code generation.
2. Not really. To sketch a class diagram of your solution you need a rough idea how that could look like. Just taking it from requirements works only for simple systems. You need to go through the use cases first to settle a usable construct.
3. To implement a system some class diagrams are essential. SDs help the coder to see how the classes collaborate. You can not generate code from that. Only code stubs from classes.